When it comes to clean bedding, the big debate is always the same: how long can you leave it before your sheets really need a wash?
With most people juggling busy schedules, stripping the bed and changing the linen can easily slide down the priority list — or get overlooked altogether. And it’s hardly the most exciting task on the weekend checklist.
But a microbiologist has now shared guidance that could make you reconsider how long you leave it between washes.
Many people aren’t laundering their bedding as often as they think. An Amerisleep survey found that more than 27 percent of Americans wash their sheets just once a month — and that’s not considered frequent enough.
Fresh sheets feel great at the end of the day, but leaving the same set on for too long can turn your bed into a buildup zone for dust, microbes, and mites. That can contribute to issues like allergy flare-ups, irritated skin, and a higher chance of picking up everyday illnesses.
Humans naturally carry huge numbers of bacteria and fungi, and those organisms can transfer onto pillowcases, sheets, and duvets during sleep. Throughout the day, we also pick up particles like dust, pollen, pollution, and other allergens, which can end up in our bedding as well — and an evening shower doesn’t fully prevent that.
The simplest fix is washing bedding more regularly.
Sheets and pillowcases should be washed weekly, or every three to four days if you’ve been ill, sweat heavily to remove sweat, oils, microbes, allergens and dead skin cells, says Primrose Freestone via The Independent.
To properly reduce bacteria and dust mites, she recommends washing at 140°F (60°C) or higher.
Dust mites living in unwashed sheets can trigger symptoms like congestion and a blocked nose, and poor bedding hygiene can also be linked to more serious health concerns.
Other bedding can go a little longer between washes — but that “rule” shifts if pets regularly climb in with you.
As a general guide, wash blankets and duvet covers every two weeks, and do it more often if animals share the bed. Use the highest temperature allowed on the care label.
Duvets themselves should typically be cleaned every three to four months, although that can vary depending on whether children or pets sleep in the bed.
Always follow the washing instructions, as some duvets can go straight into a machine, while others may need to be professionally cleaned.
Keeping up with regular washing of sheets, pillowcases, duvet covers, and duvets can help cut down on allergens, lower infection risk, and stop unpleasant odours from building up.