Twice a year. That’s the standard recommendation — once before summer storage, once when you bring it back out in autumn.
Most people wash theirs far less often than that. Some haven’t washed it in years. That’s a problem, and not just a hygiene one.
A duvet accumulates things you can’t see. Sweat. Dead skin cells. Body oils. All of it works into the filling and the cover over time.
Dust mites are the bigger concern. They thrive in warm, humid environments — a duvet is an ideal habitat. They feed on shed skin cells and reproduce quickly.Allergy UK identifies house dust mite allergens as one of the most common triggers for asthma and allergic rhinitis in the UK. A duvet that hasn’t been washed in months is carrying a significant mite population. A duvet not washed in years is carrying a very significant one.
This matters most for anyone with allergies or respiratory sensitivities. But it’s relevant for everyone. You spend eight hours a night in contact with this thing.
Twice a year is the baseline. A few things push that higher.
If you sweat heavily during sleep, wash more frequently — every three to four months. If you have allergies or asthma, every two to three months is the guidance from most allergy organisations. If you have a pet that sleeps on the bed, more often.
Summer duvets — lighter togs, used when it’s warm — often accumulate more sweat than winter ones. They need washing as often as heavier duvets despite the lower tog rating.
The duvet cover helps but doesn’t replace washing the duvet itself. The cover catches the first layer. Over time, moisture and body heat work through it into the filling.
Sometimes. It depends on the size, the filling, and whether your machine is big enough.
A single duvet in a standard 7kg or 8kg home washing machine is manageable. A double is tight. A king-size duvet cannot be washed properly in most domestic machines — it can’t move freely in the drum, which means it doesn’t rinse properly, and inadequate rinsing leaves detergent residue in the filling. That residue clumps the fill and causes persistent damp smell.
Drying is the other problem. Duvet filling — particularly down and feather — takes a long time to dry completely. Inadequately dried filling develops mould and mildew. A tumble dryer on low heat helps, but not all households have one that’s large enough. Hanging a king-size duvet to air dry in a London flat in January is rarely practical.
For anything larger than a single, a professional laundry service is the more reliable option for most London households.
Commercial machines are large enough to wash a king-size duvet properly. The filling moves freely, rinses thoroughly, and comes out clean rather than clumped. Industrial dryers at correct temperatures dry the filling completely — which matters enormously for preventing mould.
The practical argument for London specifically: most flats don’t have a tumble dryer. Many have compact washing machines. Getting a king-size duvet washed and properly dried at home is genuinely difficult. A professional service removes the problem entirely.
Ourlaundry service at Arlington Way in Angel takes duvets in all sizes — single, double, and king. Washed properly, dried completely, returned ready to use. If you need anything else looked at while you’re dropping off, ourdry cleaning service is at the same address. Walk-ins welcome.
Twice a year is the standard recommendation — once before seasonal storage, once when it comes back out. More frequently if you sweat heavily, have allergies, or share the bed with a pet.
Not effectively in most domestic machines. A king-size duvet needs room to move freely in the drum to wash and rinse properly. Most home machines are too small. A professional laundry service with commercial-grade machines is the better option.
Sweat, dead skin cells, and body oils accumulate in the filling over time. Dust mite populations grow — their allergens are a common trigger for asthma and allergic rhinitis. The duvet also begins to smell, even if it isn’t immediately obvious.
Visible staining is the obvious sign. But smell is more reliable — a musty or stale odour that persists after airing means it needs a wash. If you can’t remember the last time it was washed, that’s also a reasonable indicator.
Most modern duvets — synthetic, down, feather — are designed to be laundered rather than dry cleaned. Check the care label. Professional wet washing in a large-capacity machine is the standard approach for most duvets. Dry cleaning is rarely required unless the label specifically states it.
