Pillow washing attracts more than its share of bad advice, and following the wrong tip is how pillows get ruined. Here are the myths that cause the most damage, and what to do instead. The one rule that overrides everything: the sewn-in care label beats any general advice, including ours.
Myth: every pillow can go in the washing machine
Reality: only some can. Polyester and down are usually machine washable; memory foam and latex are not — water and agitation break them down and they dry slowly and unevenly, so the core stays damp and smells. Solid-foam pillows should be spot-cleaned and aired, never machine washed.
Myth: a hot wash is always best
Reality: hot water cleans thoroughly but stresses fibres, so the right temperature is the one the label allows, not the hottest available. A gentle, warm cycle is the safer default for anything washable.
Myth: if it feels dry, it is dry
Reality: this is the single most common way pillows are ruined. The surface dries long before the core, and a damp centre grows a musty smell. Tumble on low heat with two or three dryer balls, expect several cycles, and squeeze the middle to check — if it is even slightly cool or damp, keep going. A quick sniff test of the centre once it has cooled is a good final check.
Myth: fabric softener keeps pillows fresh
Reality: softener coats the fibres, reducing loft and absorbency, and can trap scent rather than remove it. Skip it entirely, and add an extra rinse to flush detergent from the middle instead.
Myth: a lumpy pillow just needs replacing
Reality: sometimes it just needs a proper wash and a full tumble with dryer balls to redistribute clumped fill. Only if it stays lumpy or flat afterward has the loft actually gone. Try washing first — see when a pillow really is finished.
Myth: you should only wash pillows once a year
Reality: every three to six months is a common baseline, and pillowcases need washing far more often since they take most of the contact. Wash on a sunny, low-humidity day if you can — a damp room works against you, as our guide to damp bedrooms explains.
Myth: a protector makes washing unnecessary
Reality: a protector reduces what reaches the filling, but the pillow still needs washing on a schedule, and the protector needs washing more often than the pillow itself. It is a barrier, not a substitute — see pillow protectors.
Myth: you can use it again before it is fully dry
Reality: a partly dried pillow is worse than an unwashed one, because trapped moisture grows mould and a musty smell. If you cannot finish drying it, leave it out to air and use a spare rather than making the bed with a damp pillow.
Match the method to the filling
| Filling | Machine wash? | Drying |
|---|---|---|
| Polyester | Yes — gentle, two at a time | Tumble low with dryer balls |
| Down / feather | Yes, with care | Long tumble with dryer balls; be patient |
| Memory foam | No | Spot-clean and air in the shade |
| Latex | No | Spot-clean and air away from sun |
| Buckwheat / hull | Cover only | Air the hull; wash the cover |
Washing pillows without wrecking the machine
Pillows are bulky and can unbalance a drum, so a few habits keep both pillow and machine happy: wash two of similar size together so the load balances, use a gentle cycle rather than a long hot one, and press water out by hand instead of wringing or twisting. If a seam is already splitting, repair it or retire the pillow before washing, or the filling escapes and clogs the machine. And if your machine is small, a launderette's larger drum is a safer home for a big down pillow than an overloaded home cycle.
Frequently asked questions
How often should I wash pillows?
Every three to six months is a common baseline, with pillowcases washed far more often since they take most of the contact.
Can I wash a pillow that has gone lumpy?
A wash and a thorough tumble with dryer balls can redistribute clumped fill, but a pillow that stays lumpy or flat has usually lost its loft and is ready to replace.
Is it safe to dry a pillow in the sun?
Sunlight and fresh air help dry and freshen fabric pillows. Prolonged direct sun can degrade foam and some fibres, so keep solid-foam pillows in the shade.
Sources and research notes
Methods follow general textile care and manufacturer guidance. Always defer to the care label on your specific pillow.
Written and edited by the Resthearth Editorial. Each guide starts from a real bedroom decision, is checked against the sources listed above, and is updated when guidance changes. We are an independent editorial desk, not medical professionals — read how we research and update our guides.
