Household Cleaning
& Laundry

1.1 The Four Levers of Cleaning

Every cleaning job is a balance of four things: chemistry (the product), temperature, action (scrubbing, the tumble of a drum) and time (how long the product sits on the dirt). Reduce one and you must make up for it with another: a cool wash needs a good detergent and a full cycle; a cold soak needs time. Most household dirt comes off with warm water, a little detergent and a cloth. Stronger chemicals are for what defeats that combination, and they bring risks of their own.

1.2 The pH Scale and Household Products

The pH scale runs from 0 to 14. Pure water is neutral at 7; below is acidic, above is alkaline. The scale is logarithmic, so each whole step is a tenfold change. The rule worth memorising: acids dissolve minerals; alkalis dissolve grease and protein.

1.3 Acids

Household acids remove mineral deposits. Hard water leaves calcium carbonate behind as limescale; an acid reacts with it, releasing carbon dioxide (the fizz) and leaving soluble salts that rinse away.

• Citric acid crystals are odourless, cheap and an effective general descaler.
• Vinegar (acetic acid) works on light deposits and glass, but smells and is weaker on heavy scale.
• Sulfamic, lactic, formic and hydrochloric acids appear in branded limescale removers, toilet cleaners and patio cleaners. Several are corrosive; hydrochloric acid is the most aggressive acid you are likely to meet at home.

Acids also attack anything made of calcium carbonate: marble, limestone, travertine and the cement in grout (Section 6.2).

1.4 Alkalis

Strong alkalis react with fats to form a crude soap (saponification) that water carries away, and they loosen protein soils.

• Bicarbonate of soda is only mildly alkaline; its value is as a gentle abrasive and odour absorber. Poured onto vinegar it fizzes impressively, but the two neutralise each other, leaving mostly salty water.
• Soda crystals (washing soda) are a genuinely strong alkali. One long-established UK brand's technical data sheet gives pH 11.7 for a 10% solution, suggests 1 tablespoon to 500ml of water as a mild strength, and warns against use on aluminium.
• Sodium hydroxide (caustic soda) is the active ingredient of many oven and drain cleaners. It burns skin and eyes and damages aluminium and paint.

Strong alkalis also harm wool and silk, which are protein fibres.

1.5 Surfactants: Why Detergent Works

Oil and water do not mix, so water alone is poor at removing grease. A surfactant molecule has a head attracted to water and a tail attracted to oil. The tails bury themselves in grease; with agitation, the grease is lifted off and broken into tiny droplets wrapped in surfactant, called micelles, which stay suspended and rinse away.

Washing-up liquid, laundry detergent and most spray cleaners are surfactant blends. Soap is the oldest surfactant; its weakness is that it reacts with calcium in hard water to form scum. More is not better: excess surfactant leaves a sticky film that attracts dirt, and in a washing machine causes residue and smells.

1.6 Solvents

A solvent dissolves a substance directly. Water dissolves sugars, salts and many food soils. For things it cannot touch:

• Surgical spirit or isopropyl alcohol: ballpoint ink, label residue.
• White spirit: oil-based paint, tar.
• Acetone (in many nail varnish removers): nail varnish and some glues. It dissolves acetate and triacetate fabrics and many plastics.

Most solvents are flammable. Use small amounts, ventilate, keep them away from flames and sparks, and never put them in a washing machine or tumble dryer.

1.7 Enzymes

Biological detergents contain enzymes that break specific soils into fragments: protease for protein (blood, egg, grass, sweat), amylase for starch and lipase for fats. They let a modern detergent clean well at 30°C or 40°C. Because wool and silk are themselves protein, enzyme detergents are unsuitable for them.

A long-standing UK belief holds that bio detergents irritate skin. A 2008 review in the British Journal of Dermatology (Basketter and colleagues) examined forty years of evidence and concluded that enzymes in laundry products do not translate into a risk of skin irritation or allergy. Anyone with a persistent skin problem should still see a GP or pharmacist.

1.8 Oxidisers: Chlorine and Oxygen Bleach

Bleaches work by oxidation, breaking down the chemical structures that give stains their colour and damaging micro-organisms.

Chlorine bleach is sodium hypochlorite. UK government guidance notes that household bleach usually contains about 5%, and some products up to 10%. It disinfects and whitens, but it damages wool, silk and elastane, strips most dyes, can pit stainless steel, intensifies rust stains, and reacts dangerously with acids and ammonia.

Oxygen bleach is usually sodium percarbonate, a solid compound of sodium carbonate and hydrogen peroxide. Dissolved in water it releases hydrogen peroxide, which bleaches, and sodium carbonate, which boosts cleaning. It is the active ingredient of most "oxi" stain removers, is much gentler on colours, and works faster in warm water; check the pack for temperature limits and fibre exclusions. A 3% hydrogen peroxide solution from a pharmacy is useful for spot-treating whites.

1.9 Cleaning, Sanitising and Disinfecting

The Food Standards Agency's household guidance draws the distinction clearly:

• Detergents clean and remove grease but do not kill bacteria or viruses.
• Disinfectants kill bacteria and viruses, but only on a visibly clean surface and only if you follow the stated contact time.
• Sanitisers kill bacteria but may not kill viruses. They can be used in two stages: once to clean, then again on the clean surface, left for the required time.

The most useful idea in this book is the two-stage clean: clean first, then disinfect if needed. Spraying antibacterial product on a greasy worktop and wiping straight away does little. The contact time (dwell time) on the label is how long the surface must stay wet to achieve the claimed kill; if a spray dries before then, reapply. Food safety guidance for businesses asks that disinfectants meet BS EN 1276 or BS EN 13697, and seeing either number on a household product is a reasonable sign its claim has been tested.

Most of the time, thorough cleaning with detergent and hot water is enough. Disinfection earns its place on surfaces that have touched raw meat, poultry, fish or eggs, and on toilets, taps and handles when someone in the house is ill.

2.1 Products That Must Never Be Mixed

Most serious cleaning accidents are caused not by one product used carelessly but by two products reacting together in a small, unventilated room. Two reactions every household should know:

• Bleach and acid make chlorine gas. UK government guidance on sodium hypochlorite states plainly that mixing it with acidic products produces chlorine gas. Acidic products include vinegar, lemon juice, citric acid, limescale removers, many toilet cleaners and rust removers. Even low levels irritate the eyes, nose and throat and cause coughing; higher levels cause chest pain, severe breathing difficulty and fluid on the lungs. The classic accident is thick bleach under the toilet rim followed by an acidic limescale gel.
• Bleach and ammonia make chloramines, which the same guidance describes as highly irritating to the respiratory tract. Ammonia appears in some glass and surface cleaners, and US public health guidance lists urine as a source, so bleach on a heavily urine-soiled toilet or litter tray can give off irritating fumes.

Health authorities also warn that bleach and surgical spirit can form chloroform, that hydrogen peroxide and vinegar form irritant peracetic acid, and that two different drain cleaners can react dangerously. Labels do not always list every ingredient, so the only safe rule is never to combine two cleaning products unless the manufacturer explicitly says you can.

2.2 Ventilation and Personal Protection

• Open a window and run the extractor fan when using bleach, solvents, oven cleaner, mould sprays or aerosols. Close the door to the rest of the house.
• Spray onto a cloth rather than into the air, especially at head height.
• Wear rubber or nitrile gloves for bleach, oven cleaner, soda crystals and descalers, and eye protection for anything carrying a corrosive pictogram, for overhead spraying and for mould work.
• Leave the room if you start coughing, your eyes sting or you develop a headache.

People with asthma or other lung conditions should be especially cautious with sprays, bleach and mould removal, and may prefer to leave those jobs to someone else.

2.3 Storage and Children

NHS advice on preventing poisoning is direct: store chemicals out of reach of children, ideally in a locked cupboard; fit safety catches to low cupboards holding cleaning products; and keep liquid cleaners in their original containers so they cannot be mistaken for drinks. In practice, move products from under the sink to a high or locked cupboard if young children live in or visit the house, click child-resistant caps fully shut, store acids and bleach apart, and keep stocks small. Bleach also loses strength over time, faster when warm.

Laundry capsules are small, bright and squashy, and young children have been seriously harmed by biting them. Under the CLP Regulation (Annex II, section 3.3, added by Commission Regulation (EU) No 1297/2014 and retained in Great Britain), their outer packaging must be opaque, carry "Keep out of reach of children" and have a closure needing both hands, and the film must contain a bitter aversive agent. These measures reduce the risk; they do not remove it. Keep the tub closed and high up.

2.4 Reading the Label: CLP Hazard Pictograms

Hazardous chemicals sold in Great Britain are labelled under the GB CLP Regulation, overseen by the Health and Safety Executive. HSE describes the pictograms as diamonds with a red border and white background.

Alongside the pictogram is a signal word ("Danger" or the less severe "Warning"), hazard statements such as "Causes severe skin burns and eye damage", and precautionary statements such as "Keep out of reach of children". For more detail, search for the product's safety data sheet (SDS): section 9 gives properties including pH, and section 10 lists incompatible materials.

2.5 If Something Goes Wrong

Follow the NHS advice on poisoning and eye injuries:

• While waiting: do not make the person sick or give them food or drink; use the recovery position if they are unconscious but breathing, CPR if they are not breathing; take the packaging to hospital.
• Eyes: hold the eye open and run lots of clean, cool or lukewarm water over it for at least 20 minutes, with a gentle flow.
• Skin: remove contaminated clothing and wash with plenty of lukewarm water and soap; government guidance on bleach suggests 10 to 15 minutes, then seek medical advice.
• Fumes: if you mix products by accident, leave the room, close the door, get into fresh air, and do not go back to sort it out. Call 999 if anyone is coughing, wheezing, breathless or has chest pain.

3.1 Food Hygiene and Cloths

The FSA's household guidance says cleaning removes harmful bacteria, viruses and parasites from food areas, and asks you to clean four things regularly: hands; work surfaces and chopping boards; dish cloths, sponges and tea towels; and utensils, dishes and containers. In practice:

1. Clear the worktop, wash your hands with soap and warm water, and wipe the surface before preparing food.
2. Use separate chopping boards for raw and cooked food where possible. With one board, prepare vegetables and ready-to-eat food first and raw meat, fish and poultry last.
3. After raw meat, poultry, fish or eggs, wash your hands, then the board, knife and worktop with hot soapy water; disinfect the worktop if you wish, respecting the contact time.
4. Do not wash raw meat or poultry. The FSA warns that tap splashes spread bacteria onto hands, clothes, utensils and worktops.

Cloths are where hygiene usually fails. The FSA advises washing or changing dish cloths, tea towels, sponges and oven gloves regularly, drying them before reuse, and using separate cloths for surfaces and washing up. A workable system: colour-code cloths by task and never cross them over; swap the kitchen cloth daily and wash used ones hot; use kitchen paper for raw meat spills. NHS England's laundering guidance notes that a ten-minute wash at 60°C removes almost all micro-organisms, so 60°C is a sensible standard for kitchen textiles. Wash microfibre without fabric conditioner, which clogs it.

3.2 Worktops and Sinks

Daily, hot water with a little washing-up liquid, then a dry cloth, is enough for most worktops. Check Chapter 6 before using anything stronger.

• Laminate: tolerant; avoid abrasive creams and water standing in joints.
• Solid wood: wrung-out cloth, dry at once, re-oil with the maker's oil; no bleach or strong alkalis.
• Granite and quartz composite: mild detergent; follow the maker's care sheet on bleach, alkalis and pads.
• Marble and limestone: never acids, including vinegar and lemon (Section 6.2).

Stainless steel sinks look dull mainly from dried water and limescale. Wash, dry, and use a cream cleaner along the grain for sheen. Avoid wire wool, which leaves rusting particles, and do not leave bleach standing in the sink: stainless equipment makers warn that chlorides cause pitting. For taps, see Section 4.4.

3.3 Hobs

Ceramic and induction hobs share a glass-ceramic surface. SCHOTT, the maker of CERAN glass-ceramic, advises removing burnt-on deposits with a metal razor scraper at about 30°, then using a cleaner made for glass-ceramic. If sugar, plastic or foil melts onto a hot zone, scrape it off immediately while hot, wearing an oven glove, to avoid permanent damage. SCHOTT advises against oven sprays, cleaners containing chlorine or ammonia, stain removers and abrasive sponges or scouring pads of any type.

On gas hobs, soak cast-iron pan supports in hot water with washing-up liquid or soda crystals, scrub, rinse and dry. Brush burner caps clean without blocking the flame ports, dry everything thoroughly and refit the caps correctly before relighting.

3.4 The Oven

Oven grime is fat and sugar baked into a hard, partly carbonised film. First check for self-cleaning features: pyrolytic cycles burn deposits to ash (follow the manual exactly and ventilate); catalytic liners absorb fat during cooking and are ruined by oven cleaner.

Most heavy-duty oven cleaners are based on sodium hydroxide; the product information for one widely sold UK kit lists 5 to under 12% and a "Danger" label for severe skin burns and eye damage.

For lighter grime, a paste of bicarbonate of soda and water left overnight on cold enamel, then scraped and wiped off, is slower but gentler.

3.5 Extractor Hood

A saturated grease filter is both a fire risk and the reason a hood stops working. Metal mesh and baffle filters can usually be soaked in very hot water with washing-up liquid or soda crystals, brushed and rinsed; many are dishwasher-safe, but check the manual, as aluminium mesh may discolour. Charcoal filters in recirculating hoods are replaced at the maker's interval, not washed, unless the manual says they can be regenerated.

3.6 Fridge, Freezer and Microwave

Food Standards Scotland advises keeping the fridge between 0°C and 5°C and checking with a fridge thermometer, because the dial is a power setting, not a temperature; its own study found over half of monitored fridges ran warmer than 5°C on average. Wipe spills, especially raw meat juices, at once. Every month or two, empty the fridge, wash shelves and drawers in warm soapy water (let cold glass reach room temperature first), wipe the interior and seals, clear the drain hole at the back, and store raw meat on the bottom shelf. Avoid scented cleaners inside.

Defrost a manual-defrost freezer when ice builds up, letting it melt naturally or with a bowl of hot water inside; never chip ice with a knife. To clean a microwave, heat a bowl of water until the window fogs, leave the door shut for a few minutes, then wipe the softened splashes away. Take care with the hot bowl.

3.7 Drains and Washing-Up

Never pour fat down the sink; wipe greasy pans with kitchen paper first and use a plughole strainer. For a slow kitchen drain, try hot water with soda crystals dissolved in it and a plunger before any chemical unblocker. When washing up by hand, use water as hot as gloved hands can stand, work from glasses to cutlery to plates to pans, and change the water when it is greasy. Air-drying on a rack beats a tea towel that has been used all day.

4.1 Hard Water in the UK

Hardness is dissolved calcium and magnesium, picked up as water passes through chalk and limestone. The Drinking Water Inspectorate (DWI) classifies it by equivalent calcium carbonate:

Broadly, much of south-east, eastern and central England has hard or very hard water, while Scotland, Wales, Northern Ireland, much of north-west England, and Devon and Cornwall generally have softer supplies. Local variation is large: the DWI advises asking your water company for an accurate figure. Companies quote it in mg/l or in degrees Clark (one degree Clark is about 14.3 mg/l). You need it to set a dishwasher softener and dose laundry detergent.

The DWI notes that hard water scales kettles, irons and appliances, shortening element life; gives less lather; and leaves tide marks on sanitaryware. There is no UK drinking water standard for hardness. If you fit an ion-exchange softener, the DWI advises keeping an unsoftened drinking tap in the kitchen, and recommends buying magnetic "scale reducers" only on a sale-or-return basis.

4.2 Removing Limescale

Limescale forms where hard water is heated or evaporates. Because it is a carbonate, the remedy is an acid, applied with method:

1. Check the surface. Acids etch natural stone and grout, and can damage plated, brushed or coloured tap finishes, old enamel and some plastics.
2. Use the weakest acid that works: a mild citric acid solution for light deposits, a branded limescale remover for heavy ones on surfaces that can take it.
3. Keep it wet with a soaked cloth or a gel on vertical surfaces, and leave for the time on the label.
4. Agitate gently with an old toothbrush or non-scratch pad, and repeat rather than scour.
5. Rinse thoroughly and dry. Wiping or squeegeeing wet surfaces after use prevents most new scale.

4.3 Descaling a Kettle

4.4 Taps, Shower Heads and Screens

Taps. Check the tap maker's care guide before using any descaler. Hansgrohe, for example, recommends a mild citric-acid-based cleaner sprayed onto a cloth rather than the tap, then a thorough rinse and a dry, soft cloth. It warns against products based on vinegar, acetic, formic, phosphoric or hydrochloric acid, sodium hydroxide or sodium hypochlorite, and against bicarbonate of soda, metal sponges, brushes and microfibre cloths, which can damage the finish over time. Soak the unscrewed aerator in a mild citric solution, rinse and refit.

Shower heads. Unscrew the head, soak it in a citric acid solution or descaler, rub the rubber nozzles to push scale out, rinse and refit. If it will not come off, tie a bag of descaler around it. On an electric shower, clean only the head and hose; never open the unit.

Screens. Squeegee after every shower. For established scale, spray a limescale remover or diluted white vinegar on the glass, leave briefly, wipe with a non-scratch sponge, rinse and squeegee. Check whether the glass has an easy-clean coating, which some cleaners damage, and rinse aluminium frames well. Acrylic trays and baths scratch: use non-abrasive cleaners only.

4.5 Toilets

1. Flush, apply toilet cleaner under the rim and around the bowl, and leave it for the time on the label.
2. Meanwhile wipe from cleanest to dirtiest with a toilet-only cloth: flush handle, cistern, lid, seat both sides, hinges, outside of the pan, base.
3. Brush the bowl and under the rim, flush, and let the brush drip dry over the bowl.

For a brown limescale ring at the water line, first lower the water level (plunge it down the U-bend with the brush) so an acidic toilet descaler reaches the ring at full strength, leave, scrub and flush. Repeat for thick deposits.

4.6 Mould on Silicone and Grout

Black spots on sealant and grout are mould growing on soap residue in a damp room. Ventilate, wear gloves and eye protection, and use a mould and mildew remover as directed; UK government guidance states these should be used in preference to bleach for health and safety reasons. Grout usually brightens with an old toothbrush. If silicone stays black, the mould is inside it: cut the sealant out, clean and dry the joint, and reseal with a sanitary silicone containing fungicide. Prevent recurrence by running the extractor fan during and after every shower. Mould spreading on walls and ceilings points to a damp problem (Chapter 7).

5.1 Dust and the Order of Work

Dust settles continuously, so order decides whether you clean a room or rearrange its dirt: work top to bottom (cobwebs, light fittings, shelves, skirting, floor), dry before wet (vacuum before mopping), and far side to door. A slightly damp microfibre cloth captures dust better than a feather duster. Switch electronics off, use a dry microfibre cloth on screens, and never spray liquid onto them.

5.2 Floors by Type

Always vacuum or sweep before mopping, and check the floor maker's care guide.

These are typical of manufacturers' advice. Quick-Step, for example, warns that too much water can permanently damage laminate and rates only certain ranges for steam mops; Karndean advises a pH-neutral cleaner for its vinyl floors and warns against bleach-based cleaners.

5.3 Carpets and Rugs

Grit at the base of the pile cuts fibres underfoot, so regular slow vacuuming, especially at entrances and on stairs, does more for a carpet than shampoo. For spills:

1. Scrape up solids from the edge inwards.
2. Blot, never rub, with white kitchen paper or cloth.
3. Dampen with a little cold water and blot again until no more colour transfers.
4. If a mark remains, use a spot cleaner suited to the fibre, tested on a hidden area; on wool, choose one carrying the WoolSafe mark or approved by the carpet maker.
5. Blot with plain water to remove detergent residue, which otherwise attracts dirt, then dry under a weighted pad of kitchen paper.

Wool is a protein fibre: keep chlorine bleach, oxygen bleach not approved for wool, and strong alkalis such as soda crystals off it. Hot water extraction machines work if you vacuum first, use minimal detergent, rinse, and dry quickly; over-wetting can shrink carpet and cause brown marks and mould. Do not machine wash hand-knotted or antique rugs. A worked red wine example is in Section 12.6.

5.4 Upholstery and Mattresses

Vacuum upholstery weekly with the brush tool and turn cushions to even wear. Check labels before washing removable covers: many are dry-clean only or shrink. Spot-clean fixed covers with minimal moisture: a cloth dampened with upholstery shampoo or diluted washing-up liquid, blotted, then blotted with plain water, working inwards and feathering the edges. Clean leather with products made for its type; aniline (uncoated) leather marks very easily. Test everything on a hidden area first.

A mattress cannot be washed, so protect it with a washable protector. Air the bed each morning, vacuum the mattress every month or two, and turn or rotate it as the maker advises. Treat blood, sweat and urine with cold water and an enzyme spotter, blotting with minimal moisture, never hot water, and let it dry fully before remaking the bed.

5.5 Windows and Mirrors

Streaks come from leftover detergent and water drying too fast. Clean glass out of direct sun, wipe frames and sills first, wash with warm water and a few drops of washing-up liquid, and remove it with a squeegee in overlapping strokes, wiping the blade each time. For mirrors, spray water or diluted white vinegar onto a microfibre cloth rather than the glass, then buff dry. Never lean out of upper windows or stand on chairs; use a long-handled squeegee or a window cleaner.

6.1 The Golden Rules

Most cleaning damage comes from the wrong product on the right surface. Three rules prevent nearly all of it: start gentle (warm water and washing-up liquid first); know the material, and if you do not, treat it as the most delicate thing it could be; and test in a hidden spot after checking the maker's care guide, as unapproved cleaners can void warranties.

6.2 Natural Stone

Calcareous stones (marble, limestone, travertine, many terrazzos) are mostly calcium carbonate, which acids dissolve. The US General Services Administration's preservation guidance lists wine, fruit juice, vinegar, tomato, mustard, fizzy drinks and salad dressing among substances that etch them. An etch is not a stain but a dull mark where the polish has been dissolved; it needs honing and repolishing. Siliceous stones (granite, quartzite, most slates) resist household acids far better, though their sealers may not.

For all stone, wipe spills at once, clean with a pH-neutral stone cleaner or a few drops of washing-up liquid in water, rinse and dry. Never use vinegar, lemon, citric acid, limescale removers or abrasive powders on marble or limestone. If a drop of water darkens sealed stone within a few minutes, the sealer has worn and needs renewing with the supplier's product. Limescale on a marble shower cannot be removed with acid without etching; squeegeeing is the only gentle prevention.

6.3 Metals

• Stainless steel relies on a thin chromium oxide film. Equipment makers warn that bleach and chlorides cause pitting and that wire wool leaves rusting particles. Use warm soapy water, wipe along the grain, rinse and buff dry.
• Aluminium is attacked by strong alkalis (soda crystals, oven cleaner, some dishwasher detergents) and more slowly by acids. Use washing-up liquid, and check before putting it in a dishwasher.
• Copper and brass: if lacquered, use only a damp cloth, as polish strips the lacquer. Unlacquered pieces can be polished with a proprietary metal polish. Leave valuable patina to a conservator.
• Chrome plating is thin and scratches easily; use a soft damp cloth, and for limescale a mild citric product on a cloth (Section 4.4).
• Silver tarnishes by reacting with sulfur compounds in air. Use a silver polish sparingly; each polish removes a little metal.

6.4 Glass, Ceramics, Plastics and Wood

• Glass-ceramic hobs: scraper and hob cleaner only (Section 3.3).
• Glazed ceramic and vitreous china: tolerant of most cleaners; grout is the weak point.
• Enamel: avoid harsh abrasives; strong acids dull old enamel.
• Acrylic and plastics: non-abrasive cleaners only; acetone and some solvents craze or dissolve them.

On wooden furniture you are cleaning the finish, not the wood. Lacquer or varnish: dust, barely damp wipe, dry. Oil: damp wipe and periodic re-oiling; no detergents. Wax: dust and buff; no water or spray polish. French polish (shellac, on antiques): dust only, because water, heat and alcohol mark or dissolve it. White rings on antiques are a restoration job.

Matt emulsion walls mark easily and many are not truly washable: dab gently with a damp cloth and a drop of washing-up liquid rather than scrubbing. Gloss and eggshell woodwork takes warm water with washing-up liquid or sugar soap.

6.5 Surface Compatibility Chart

"Check" means it may be acceptable in some cases; read the maker's guidance first.

7.1 Why Mould Matters

Mould is a fungus that grows wherever moisture persists on something organic: soap residue, dust, wallpaper paste, fabric. The UK government guidance Understanding and addressing the health risks of damp and mould in the home, published by the Ministry of Housing, Communities and Local Government, the Department of Health and Social Care and the UK Health Security Agency, states that damp and mould primarily affect the airways and lungs, and can also affect the eyes and skin. Effects include worsening asthma and allergies, respiratory infections, and fungal infections in people with weakened immune systems. In the most severe cases it can kill: the guidance was produced in response to the death in December 2020 of two-year-old Awaab Ishak from a respiratory condition caused by prolonged exposure to mould at home.

Those at greater risk include people with asthma, COPD, cystic fibrosis or other lung or heart conditions; people with weakened immune systems; people with mental health conditions; children; older people; and pregnant women and new mothers. The NHS page on damp and mould now redirects to this guidance.

7.2 Condensation and Its Causes

Warm air holds more water vapour than cold air. When warm, moist air meets a cold surface, it cools and the water condenses. The government guidance calls condensation the most common form of damp, typically appearing on window frames, corners and low points on walls behind sofas or wardrobes.

The guidance names showering, drying laundry and cooking as moisture sources, and points to inadequate ventilation and homes that are hard to heat as major causes. It is emphatic that damp and mould should not be blamed on tenants' "lifestyle choices". Other forms of damp are building problems, not cleaning problems: penetrating damp from leaking gutters, roofs or pointing; rising damp from the ground, which the guidance notes is often misdiagnosed; and plumbing leaks.

7.3 Cleaning Small Areas Safely

The guidance says most occupants could reasonably be expected to remove condensation and very small amounts of mould with an appropriate mould and mildew cleaner, that larger areas should be dealt with by professionals, and that mould and mildew products should be used in preference to bleach for health and safety reasons.

The guidance notes that mouldy carpets, soft furnishings and ceiling tiles may have to be thrown away, as mould can be impossible to remove from absorbent materials. Painting over mould with ordinary paint only hides it.

7.4 Preventing Condensation

The government guidance's advice for occupants:

• Use extractor fans in kitchens and bathrooms while cooking and bathing, or open the window.
• Close internal doors when cooking or showering, and cook with pan lids on.
• Dry laundry outdoors where possible (Section 10.5 covers drying indoors).
• Leave a gap between furniture and external walls, and open windows periodically.

Wiping condensation off windows each morning and keeping the home steadily warm also help. A cheap hygrometer shows whether ventilation is working, and a dehumidifier can support, not replace, ventilation in a persistently damp room.

8.1 Principles

The longer a stain sits, and the more it is heated, the harder it is to remove. US university extension services, whose laboratory-tested guides remain among the best available, agree on these rules:

• Treat quickly, and read the care label first. Take dry-clean-only items to a cleaner and say what the stain is.
• Test every treatment on a hidden seam or hem, and let it dry before judging.
• Blot, do not rub, working from the back of the fabric over an absorbent pad.
• Start with cold water when unsure; hot water sets protein stains.
• Never tumble dry or iron a stained item until the stain has gone.
• Repeat a gentle treatment rather than escalating to a harsh one.

8.2 The Five Families of Stains

Cornell University's guide states the key rule for combination stains: always treat the greasy or oily component first. Many foods and medicines also contain added colouring that needs a final dye step.

8.3 The Order of Operations

1. Lift off solids with a blunt knife; blot liquids; let mud dry and brush it off.
2. Identify the family; if unsure, assume protein.
3. Flush from the back with cold water.
4. Pretreat by family and leave for the time on the product, keeping it damp.
5. Wash within the care label limits.
6. Check while damp in good light. If any trace remains, repeat; air dry until sure.

8.4 Stain-by-Stain Guide

For washable fabrics that tolerate the treatment. On wool and silk, use only cold water, a wool-safe detergent and gentle blotting, and consult a dry cleaner for anything stubborn.

8.5 Stains That Usually Will Not Come Out

Some marks are damage, not deposits. Cornell's guide lists among stains unlikely to be removed: strong acids and alkalis (toilet, grout, drain and oven cleaners), chlorine bleach and pool chemicals, benzoyl peroxide in acne creams, some disinfectants, and old urine. Texas A&M adds dried paint and antiperspirant metal-salt residues. Recognising these saves you damaging a garment further.

9.1 Reading a Care Label

The care symbols on clothes sold in the UK and Europe were devised by GINETEX, the international association for textile care labelling, founded in 1963. GINETEX owns them as registered trademarks and lets ISO use them in ISO 3758, the care labelling standard, now in its 2023 edition; in the UK, the trade body UKFT licenses them to manufacturers. Separately, the Textile Products (Labelling and Fibre Composition) Regulations 2012 require textile products to show their fibre content. The fibre tells you how a fabric behaves; the symbols tell you the limits the maker has set.

The symbols always run in the same order: washing, bleaching, drying, ironing, professional care. A cross over any symbol forbids that treatment. Bars under the tub or circle ask for a gentler process: one bar mild, two bars very mild.

Washing (tub). The number is the maximum water temperature in °C. GINETEX associates 95°C and 70°C with white or fast-dyed cotton and linen; 60°C with coloured cotton and polyester that must not be boiled; 40°C and 30°C with darker and more delicate items. One bar means a mild cycle with a reduced load and short spin, for viscose, modal and synthetics; two bars a very mild cycle with the drum no more than a third full, for machine-washable wool. A hand in the tub means hand wash at no more than 40°C.

Bleaching (triangle). Empty: any bleach. Two diagonal lines: oxygen (non-chlorine) bleach only. Crossed: no bleach.

Drying (square). A circle means tumble drying: two dots normal heat (GINETEX gives 80°C), one dot low heat (60°C). Lines mean natural drying: a vertical line for line drying, a horizontal line for drying flat; doubled lines mean drip drying without spinning, and a diagonal in the corner means dry in the shade.

Ironing (iron). Under GINETEX's current descriptions, one dot is a maximum soleplate temperature of 120°C (acrylic, nylon, acetate), two dots 160°C (wool, silk, polyester, viscose), and three dots 210°C (cotton, linen). Older guides and irons quote 110, 150 and 200°C from earlier editions. Crossed steam lines under the iron mean no steam. GINETEX advises choosing the setting from the label, not the fibre.

Professional care (circle). P means dry cleaning in perchloroethylene or hydrocarbon solvents, F hydrocarbons only, W professional wet cleaning. A crossed circle means do not dry clean, and GINETEX adds that solvent-based stain removers should not be used at home on such items either.

9.2 Sorting the Wash

1. By care limits: the most restrictive label in a load sets the cycle.
2. By colour: whites, lights, darks; new strongly dyed items separately for their first washes.
3. By weight and fibre: keep towels and jeans away from delicates, fleece and dark synthetics.
4. By soiling and hygiene: heavily soiled kit, kitchen cloths and illness-soiled laundry separately and hotter (Section 10.2).

Empty pockets, close zips, unbutton shirts, turn darks, prints and knits inside out, and use a mesh bag for delicates. Do not overload: clothes need room to move through the water.

9.3 Detergent Types and Dosing

Packs give doses for soft, medium and hard water; harder water needs more, because some detergent is used up softening it. Find your hardness (Section 4.1) and use the right row. Overdosing is just as common: Electrolux's UK guidance explains that modern machines use far less water than older ones, so pack doses can be generous, and links overdosing at low temperatures to pale streaks and a sour-smelling machine. Residue, stiff towels or excess foam mean cut the dose; grey whites or lingering odours may mean underdosing.

9.4 Fabric Conditioner

Conditioner coats fibres to reduce static and creasing and add softness. Its drawbacks: it reduces towel absorbency; Gore-Tex tells owners not to use fabric softener on its garments; it clogs microfibre cloths; some sportswear labels advise against it; and its residue builds up in the dispenser and machine. If you use it, measure it and keep it off technical and absorbent fabrics. Not overdrying, and using dryer balls, reduce stiffness without it.

10.1 Choosing a Wash Temperature

Modern detergents clean well at low temperatures, and washing at 30°C or 40°C rather than 60°C saves energy and is kinder to colours and fibres. For everyday clothes, 30°C or 40°C with a good biological detergent is enough; heavily soiled loads need a full-length programme and a correct dose rather than a quick wash.

10.2 Hygiene: When 60°C Matters

NHS England's guidance on uniforms and workwear, based on laundering research, states that washing with detergent at 30°C removes most Gram-positive micro-organisms including MRSA; that a ten-minute wash at 60°C is sufficient to remove almost all micro-organisms; and that there is little effective difference between domestic and commercial laundering. It asks staff washing uniforms at home to wash them separately, in a load no more than half the machine's capacity, at the hottest temperature the fabric tolerates.

NHS condition pages set 60°C for specific situations:

• Norovirus: wash clothes and bedding with poo or vomit on them at 60°C, separately from other laundry.
• Scabies: on the first day of treatment, wash all bedding and clothing in the house at 60°C or higher and, if possible, dry in a hot dryer; seal unwashable items in a bag for at least 3 days.
• Threadworms: wash sleepwear, sheets, towels and soft toys at a hot temperature every day for several days after treatment.

Otherwise, 60°C is a sensible choice for towels, bed linen, underwear, kitchen textiles and the clothes of anyone unwell, wherever the label allows. When handling soiled laundry, wear disposable gloves, avoid shaking it out, and wash your hands afterwards.

10.3 Fabrics by Fibre

The care label always takes priority; this table explains it.

10.4 Technical Outerwear and Down

Dirt and body oils stop a waterproof's outer fabric shedding water, so washing helps performance. Gore-Tex's outerwear care guidance, typical of the industry, says: read the garment label; machine wash at 40°C with a small amount of liquid detergent, rinse twice and minimise spinning; do not use powder detergent, fabric softener, stain removers or bleach; tumble dry warm and gentle (or line dry), then tumble a further 20 minutes to reactivate the durable water repellent (DWR) finish, or iron warm without steam through a cloth. Some ultralight shells must never be tumble dried or ironed, so check.

Down clumps and can smell or grow mould if not dried completely. Outdoor clothing makers such as Berghaus advise a down-specific wash rather than ordinary detergent, no conditioner, a gentle low-temperature cycle, and tumble drying on low heat with dryer balls until the filling is completely dry, which can take hours. A large duvet may need a launderette's large machine.

10.5 Drying

Line drying is free and adds no moisture to the house. Hang items by their strongest edges and dry dark colours inside out or in shade to limit fading.

Tumble drying: follow the dots, do not overload, clean the lint filter after every load (Section 11.3), remove items promptly, and avoid overdrying, which shrinks cotton and makes fabrics harsh and static.

Drying indoors releases the water in the laundry into the room, where it ends up as condensation. Government damp guidance names drying laundry as a main moisture source and advises drying outdoors where possible. Indoors, spin at the highest speed the fabric allows, dry in one room with the door closed and a window open or extractor running (or a dehumidifier), use an airer rather than draping clothes on radiators, and keep airers away from cold external walls.

10.6 Hand Washing and Ironing

GINETEX's instructions for the hand-wash symbol: dissolve a fine detergent completely in plenty of water; let the item float and agitate gently without rubbing, pulling or wringing; rinse well; press out water carefully; pull into shape; and do not leave coloured or delicate items lying wet. Rolling the item in a towel removes more water. Many machines have a wool cycle certified for hand-wash wool; Electrolux, for example, says its PerfectCare wool programme is Woolmark-certified as being as gentle as hand washing. Check your manual.

Set the iron by the label dots and iron coolest items first. Iron cotton and linen hot and slightly damp; iron darks, wool and silk on the reverse or through a pressing cloth; keep synthetics on low, as they melt. A garment steamer relaxes creases without pressure, suiting delicates and knitwear. In hard water areas, use the iron's anti-scale function as its manual describes.

10.7 Common Laundry Problems

11.1 Washing Machine Maintenance

Smells, grey flecks and slow draining usually come from built-up detergent, conditioner and lint and the microbes feeding on them, made worse by always washing cool. AEG's UK support guidance blames detergent residue, moisture, mould in the door seal and infrequent hot washes, and recommends the routine below. Your own manual takes priority.

Whirlpool advises against cleaning the inside of washing machines with vinegar, as its acidity can damage rubber seals and hoses over time; use a cleaner approved for your machine.

11.2 Appliances as Cleaning Tools

The washing machine handles kitchen cloths at 60°C, microfibre (no conditioner), washable cushion covers, bath mats and pet bedding, within label and capacity limits. The dishwasher handles metal hood grease filters (if the hood manual allows), plastic toys without battery compartments, soap dishes and toothbrush holders; the FSA notes you should check a chopping board is dishwasher-safe first. Keep wood, cast iron, good knives, hand-painted china, crystal, unmarked aluminium and anything electronic out.

11.3 Tumble Dryers and Fire Safety

Lint building up where hot air flows is the main tumble dryer fire risk. Register My Appliance (the appliance industry's safety registration scheme) and UK fire and rescue services advise:

• Clean the lint filter after every use, and periodically clear the vent hose of fluff and check it is not kinked or crushed.
• Install the dryer in a dry, well-ventilated room and do not overload it.
• Do not leave it running unattended; fire services advise running it during the day when you are at home.
• Plug it into a wall socket, not an extension lead or adaptor.
• Let it finish its cool-down phase and remove the load promptly.
• Register it with the maker for recall notices, and check the GOV.UK product recalls list for older models.
• Stop using it if you notice a burning smell, unusually long drying times or the outside vent flap not opening, and keep working smoke alarms.

Oily laundry can self-ignite. Northamptonshire Fire and Rescue Service explains that fat and grease residues can survive even a hot wash, and that freshly dried cloths piled up warm can smoulder and catch fire because the heat cannot escape. It advises washing tea towels hot, letting the dryer complete its cooling cycle, airing such laundry before folding, never stacking it warm, and not leaving damp washing in a warm dryer. Register My Appliance gives the same advice for towels.

Condenser and heat pump dryers: empty the water container after each load unless plumbed in, and clean the condenser or secondary filter as the manual directs.

11.4 Dishwashers and Vacuum Cleaners

Register My Appliance advises checking the dishwasher filter regularly; as a rule the inner filters can be brushed clean under the tap and the outer filter rinsed in hot water. Keep the salt and rinse aid topped up, set the built-in softener to your water hardness (AEG notes you should add about a litre of water to the salt container before the first fill), clear blocked spray arm holes, and wipe the door seals. It also suggests loading knives point down for safety.

A vacuum loses suction through full bins or bags, blocked filters and tangled brush bars. Empty it before it is full, wash or replace filters as the manual says and let washable ones dry completely (makers typically say at least 24 hours), cut hair off the brush bar, and check the hose for blockages. Unless the manual says your model can, do not vacuum water, hot ash, fine building dust or sharp debris.

In hard water areas, descale coffee machines and irons with the maker's product and programme.

12.1 A Cleaning Schedule

Houses stay clean through small, frequent jobs. Adjust this starting point for your household, pets and health needs.

12.2 Deep-Clean and End-of-Tenancy Checklist

Work room by room from the top down, leaving kitchen and bathrooms until last. Tenants should check the tenancy agreement and check-in inventory, which normally sets the expected condition allowing for fair wear and tear, and photograph each room when finished.

• Every room: cobwebs and light fittings; switches, sockets, handles, doors and frames; skirting, sills and window tracks; inside windows; radiators; marks on walls; inside cupboards and wardrobes; carpets vacuumed and deep-cleaned if dirty; hard floors mopped including corners.
• Kitchen: oven, racks, grill pan, hob and door glass; hood and filters; fridge and freezer emptied, cleaned and left ajar if off; microwave and descaled kettle; washing machine drawer, seal and filter; dishwasher filter; inside all cupboards; tiles and grout; sink and taps; behind movable appliances; bins.
• Bathrooms: limescale off taps, shower head, screen and tiles; toilet descaled including rim, hinges and base; mould treated and sealant replaced if needed; extractor grille; mirror and cabinet; plugholes cleared.

12.3 A Basic Cleaning Kit

12.4 Eco and Low-Tox Cleaning: An Honest Assessment

The greenest habit is using less: correct doses, cooler washes where hygiene allows, full loads, line drying, and cleaning little and often.

12.5 Case Study: Rescuing a Grey White Shirt

12.6 Case Study: Red Wine on a Wool Carpet

12.7 Case Study: A Limescale-Crusted Shower

14.1 Mixing Safety Table

Never combine cleaning products. This table shows why the commonest combinations are dangerous. When switching products on one surface, rinse thoroughly with water between them and ventilate.

If you have mixed products by accident: leave the room, close the door, get fresh air, and call 999 if anyone is coughing, wheezing, breathless or has chest pain (Section 2.5).

14.2 Stain Quick Chart

14.3 Care Label Quick Reference

14.4 Dilutions and Doses

Only figures taken from a manufacturer or a published guide are given here. For every branded product, the label overrides this table. "Cup" in the US extension guides means about 240ml.

14.5 Emergency Numbers and Useful Sources