How Often Should You Wash Your Sheets? Once a Week Is a Good Place to Start

You probably should change your bedsheets about once a week. Not because your bed becomes dangerous on day eight, but because night after night your sheets collect sweat, skin oils, shed skin, hair products, pet debris and whatever else you bring to bed with you. The good news: getting them properly clean is considerably less complicated than the internet sometimes makes it sound.

Fresh sheets are one of those small domestic pleasures that make you wonder why you put the job off.

The bed feels cooler. The pillow smells better. For at least one evening, everything looks considerably more organised than the rest of the house.

Then a week goes by remarkably quickly.

I would not turn sheet washing into a countdown timer, but once a week is a very good default. There is a particularly strong reason for that schedule if dust mites are an issue: the National Institute of Environmental Health Sciences recommends washing bedding and blankets weekly as part of reducing dust-mite exposure.

For everyone else, think of seven days as a routine rather than a medical deadline.

Why Weekly Makes Sense

If you spend seven or eight hours a night in bed. Multiply that by a week and your sheets have had a great deal of contact with your skin.

They pick up perspiration, body oils, shed skin and residue from whatever you put on your hair and body before climbing in.

If a dog spends half the night under the duvet—or the cat considers your pillow jointly owned—you can add fur, dander and whatever travelled in on four paws.

None of this means an unwashed bedsheet suddenly becomes hazardous. In fact, CDC guidance on household laundry is reassuring: ordinary laundering with detergent, using the recommended water temperature and drying items completely is generally sufficient. Even laundry belonging to someone who is sick can normally be washed with other household laundry.

So I would wash sheets because clean bedding is cleaner and more pleasant, not because I think the bed needs sterilising.

Some Beds Need Changing Sooner

Weekly is not sacred.

If you wake up drenched in sweat, sleep with pets, eat in bed, have visible soiling or spend a few days recovering from an illness, I would happily change the sheets sooner.

Pillowcases can deserve particular attention because they are in direct contact with your face and hair every night. The American Academy of Dermatology notes that residue from hair products can transfer to pillowcases and sheets and contribute to breakouts in susceptible people.

That does not mean dirty pillowcases are the universal cause of acne. They are simply one possible source of residue worth eliminating if you are troubleshooting a problem.

And if you sleep alone, shower before bed, have no pets and barely perspire? Going a little longer occasionally is not a domestic emergency.

The point of a routine is to make life easier, not to give you another thing to feel guilty about.

Read the Label Before You Reach for the Hot Setting

This is where the old version of this article needed the biggest correction.

It described 60°C/140°F as a “low” or “warm” temperature suitable for sheets generally.

It isn’t.

Different cottons, linen blends, synthetics, silk and speciality fabrics have different laundering requirements. CDC household guidance is refreshingly sensible: use detergent, follow the manufacturer’s directions and use the appropriate recommended water temperature.

In other words, the care label wins.

If dust-mite allergy is the concern, some public-health guidance recommends hotter washing. NIEHS, for example, recommends washing bedding weekly at 130–140°F (about 54–60°C). But allergy practice guidance notes that regular washing itself removes substantial amounts of mite allergen and advises against raising household hot-water temperatures simply to reach those numbers because of the scalding risk.

But allergy practice guidance adds an important nuance: regular washing itself removes mite allergen, and excessively hot household water introduces a scalding risk. One expert review therefore describes weekly washing in warm water as a reasonable approach rather than encouraging people to turn up their home’s water heater just to chase a particular number.

For ordinary sheet washing, I would not make this complicated.

Use the hottest setting the care instructions recommend when you have a reason to—but don’t cook good sheets unnecessarily.

Give the Detergent Room to Work

More detergent is not the secret to cleaner bedding.

Neither is cramming the washing machine until closing the door becomes an engineering exercise.

Sheets need enough room to move through the wash water. NIOSH laundry guidance specifically warns that an overloaded washer may not clean laundry properly.

So if a king-size sheet set and the duvet cover turn your drum into one enormous solid ball of wet cotton, split the load.

Use the amount of detergent specified for your machine, detergent and load conditions. Adding extra “for cleanliness” can simply make rinsing more difficult.

And deal with obvious stains before the wash. Follow the stain-treatment instructions for the product and fabric rather than drying the stain first and discovering you have permanently preserved it.

I Would Skip the Laundry-Room Folklore

The internet has accumulated an impressive number of sheet-washing rituals.

Add vinegar.

Add baking soda.

Never use warm water.

Always use hot water.

Iron everything because steam will “kill the remaining germs.”

I don’t think a normal set of bedsheets needs this much theatre.

There may be particular reasons to use a laundry additive, but I would not pour vinegar, disinfectant or anything else into every load simply because a lifestyle article told me to.

Start with the sheet manufacturer’s instructions, a suitable detergent and your washing machine’s directions.

That is decidedly less exciting.

It is also much harder to get wrong.

Dry Them Completely—But Don’t Roast Them

The wash is only half the job.

CDC recommends drying laundered items completely.

Again, follow the label for temperature. High dryer heat can be appropriate for some fabrics and situations; other sheets fare better at lower temperatures.

What I would avoid is taking bedding out genuinely damp, folding it and putting it into a closed linen cupboard.

If you line-dry, lovely. If you tumble-dry, also lovely.

The important word is dry.

What I Wish I’d Known Earlier: two sets of sheets make weekly changing dramatically easier. You do not need to wash, dry and remake the bed in one heroic Sunday afternoon. Strip the bed, put on the clean set and deal with the laundry when you deal with the laundry.

That may be the most useful bedding advice in this entire article.

What About Duvets, Mattress Protectors and Blankets?

Not everything on the bed needs to go into the machine every Saturday morning.

Sheets and pillowcases receive the most direct contact, so they deserve the regular schedule.

A duvet cover that regularly touches your body deserves washing more often too. Blankets, comforters, mattress protectors and pillow protectors can usually be washed less frequently, depending on how they are used, whether pets sleep on them, whether there have been spills and what their manufacturers recommend.

If you have a diagnosed dust-mite allergy, the strategy can be different. NIEHS recommends allergen-impermeable covers for mattresses and pillows in addition to weekly bedding washing and keeping indoor humidity at or below about 50 percent.

That is a specific allergy-management strategy—not something every bedroom needs.