How to Wash Duvets & Pillows (And How Often You Really Should)

Here's a fact that sends most people straight to the washing machine: an average duvet can double in weight over a few years of use, and that extra weight isn't padding — it's dead skin cells, dust mites and their droppings, one of the biggest triggers for bedroom allergies. Pillows fare no better, often reaching a similar state within eighteen months.

This guide covers how often duvets, pillows and protectors actually need washing, which settings suit which filling, the machine capacity rule that catches most people out, and the drying method that stops feathers turning into hard lumps — plus the tools worth buying, the mistakes that ruin bedding for good, and when a launderette or specialist cleaner is the better call.

Most UK households wash their duvet far less often than they should — once a year at best, sometimes not until it's replaced. The realistic schedule is every six months for a main duvet, every three to four months for pillows, and monthly for washable protectors, since those catch sweat and skin cells before they reach the filling. Where allergies or asthma affect the household, tighten the duvet wash to every four months. Early autumn is the natural moment for a wash anyway, when you are swapping to a warmer tog duvet — clean the summer one before it goes into storage.

The mattress underneath needs its own routine too, since it collects the same dust mite population — see our guide to how to clean a mattress for the full picture.

Protectors are the cheapest way to cut this workload. A set typically costs £15–£30 and takes the brunt of nightly sweat, so the duvet underneath keeps its loft for longer before the filling flattens for good. The mattress collects the same debris from below — our mattress cleaning method deals with that layer.

This is where most home washes go wrong, and it isn't about detergent or temperature — it's about space. A duvet needs room to tumble freely; crammed in too tightly, it can't agitate or rinse properly, leaving residue that clumps feathers or fibres together permanently.

As a rough guide, a 7kg machine copes with a single or double duvet, 9kg-plus is needed for a king size, and anything larger — super-king or a 13.5-tog winter weight — is better taken to a launderette. Launderettes typically charge £6–£12 per cycle, and their oversized dryers finish the job in one sitting rather than the several cycles a domestic dryer needs. Check your drum size against the manual, or see our comparison of top load vs front load washers for typical UK capacities.

The right settings depend entirely on what's inside the duvet, and getting this wrong is how filling ends up matted or torn apart mid-cycle. If the care label is a mystery, our guide to laundry symbols explained decodes every icon you'll find on a duvet or pillow tag.

• •Synthetic duvets and pillows: 40–60°C on a gentle cycle with an extra rinse. 60°C actually kills dust mites, worth using if the label allows. Skip fabric softener — it coats synthetic fibres and flattens the loft.
• •Feather and down: 30–40°C using a down-specific or very mild detergent, extra rinse, slow spin to avoid clumping. The wash is straightforward; it's the drying that decides whether the duvet survives intact.
• •Wool-filled duvets: only machine wash if the label explicitly says so, on a wool cycle at 30°C or below. Where the label is silent, professional cleaning is safer — wool felts permanently otherwise.
• •Memory foam pillows: never go in the machine — the foam tears under its own wet weight. Wash the cover on a normal cycle and air the foam core separately until completely dry.

Washing duvets and pillows at home doesn't need specialist kit, but a few items separate a properly finished job from a damp, lumpy one.

• •Tennis balls or wool dryer balls, set of 2–4: £3–£8 — break filling clumps apart during drying and are non-negotiable for a good result.
• •Down-specific or non-bio detergent: £5–£9 a bottle — ordinary bio detergent can be too harsh on delicate down.
• •Duvet and pillow protectors: £15–£30 a set — washed monthly, they cut how often the duvet itself needs a full wash.
• •Large mesh laundry bag, optional: £4–£7 — stops pillows bunching against the drum door seal.
• •Launderette wash-and-dry session for oversized duvets: typically £10–£20 all in. Weighing up a dryer purchase? Our guide to gas vs electric dryers covers running costs for this kind of bulky load.

Under-dried filling is the single biggest cause of ruined duvets — trapped moisture breeds mildew and leaves the inside smelling musty for months. Follow this order:

• •1. Shake the duvet out of the machine immediately, before the wet filling settles into a clump.
• •2. Load it into the dryer with two to three tennis balls or dryer balls — they batter the filling apart as it tumbles.
• •3. Dry on low heat; high heat can scorch feather casings and melt synthetic fibres.
• •4. Expect two to three full cycles for a down duvet. Pause between cycles and hand-break any clumps you feel through the fabric.
• •5. Check the centre and corners specifically — they dry last and are where mildew starts if missed.
• •6. Air the duvet over a clothes airer or banister for a further two to three hours before making the bed.
• •7. If a feather duvet still smells faintly farmyard-ish when warm, it isn't fully dry — run another cycle rather than risk it.

• •Overloading the machine to avoid a second load — the most common cause of matted filling and undissolved detergent residue.
• •Using fabric softener on synthetic filling, which coats the fibres and permanently flattens the loft.
• •Skipping the extra rinse, leaving detergent trapped inside that clumps feathers together as they dry.
• •Storing a duvet away damp, the fastest route to mould developing inside a wardrobe.
• •Machine washing a memory foam pillow, which tears the foam beyond repair — always check the label first.
• •Loading bedding into a machine that already smells musty itself; a dirty drum transfers odour onto clean filling, so see our guide to cleaning a washing machine properly if that sounds familiar.

A duvet or pillow that's visibly torn, leaking feathers, or has a broken seam should go to a specialist. Wool or silk-filled bedding without explicit machine-wash instructions is safest left to a dry cleaner, since felting and shrinkage can't be reversed.

For anything larger than a king-size duvet, or without a machine that can realistically fit one, a launderette remains the most cost-effective option — a full wash and dry typically runs £10–£20 and finishes in one visit. Persistent musty odours that survive a thorough wash and dry usually mean the filling has already started to break down, at which point replacement makes more sense than another wash.

**How often should I really wash my duvet?** Every six months for a main duvet in regular use, dropping to four months with allergies or asthma in the household. Pillows need washing every three to four months, and any protector should go in monthly.

**Can I wash a duvet in a normal 7kg washing machine?** A 7kg machine handles a single or double duvet, but a king-size or heavier winter-weight duvet needs 9kg or more to wash and rinse properly, or it ends up matted.

**Why does my duvet smell musty even after washing?** It almost always means it wasn't dried thoroughly enough — trapped moisture in the centre breeds mildew. Run another tumble cycle with dryer balls, checking the centre and corners before storing it.

**Do I need special detergent for feather and down duvets?** A down-specific or very mild non-bio detergent is gentler on feather casings than standard bio powder, and leaves less residue behind, which is where clumping starts.

**Is it safe to wash a memory foam pillow in the machine?** No — the foam core tears under its own wet weight and won't recover. Wash the outer cover as normal, and air the foam core on its own until completely dry.