How Often Do You Really Need to Wash Your Comforter?

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If your pets sleep in your bed with you, there’s a higher chance you’ll end up with outside invaders in your bed. “Dogs bringing in ticks [which then attach] to owners is a very real and not uncommon situation,” Dr. Russo says. “Likewise, cats go outside and may hunt and kill other animals with potentially dangerous infections, like tularemia, and can infect owners.” 

Allergens—particularly dust mites—are the biggest cause for concern.

While bacteria and sweat aren’t likely to build up enough to make you sick, dust mites sure can. Obviously, not everyone is allergic to dust mites, but if you are, it’s more important to regularly clean your sheets and comforter.

“The most common types of allergens found in mattress and pillows and comforters and blankets are dust mites,” Denisa E. Ferastraoaru, MD, assistant professor of medicine in allergy and immunology and attending physician at Einstein/Montefiore and Jacobi Medical Centers, tells SELF. “Dust mites are small, little creatures. They live wherever we live because they feed on our skin flakes.” And they’re most commonly found in the bedroom, she adds.

It’s sort of impossible to rid your bedroom of dust mites—everybody has them, no matter how clean you keep the house, says Dr. Ferastraoaru.

Other allergens can linger on your comforter, too. If you sit on your bed in your outside clothes, you can transfer things like pollen, grass, and ragweed onto your comforter. And if your dog or cat is running around outside and then sleeping in your bed, they can drag in these seasonal allergens, too. This may cause problems for you, depending on how sensitive you are, Dr. Steele says.

How often should you wash your comforter then? 

You should generally aim to wash your comforter once a week. There are some logistical challenges that make it difficult to wash a large, bulky comforter this often, which is typically what experts recommend to keep linens fresh and minimize allergens. 

Another option: Slip your comforter into an allergy-proof cover, and wash that once a week, Ryan Steele, DO, board-certified allergist-immunologist and assistant professor of clinical medicine at Yale School of Medicine, tells SELF. “Adding an allergy cover, which might also be called a dust mite cover, will add an extra layer of protection to lock in dust mites and reduce the number of allergens,” Dr. Steele says.

These covers work by basically locking dust mites inside the comforter so that they can’t get out and be inhaled, Dr. Ferastraoaru explains. “The fabric is very tight and will not let dust mites and dust mite allergens through.” Even better: If you’re in the market for a new comforter, put an allergy cover on it before you use it the first time to prevent dust mites from getting inside in the first place, she says.

Dr. Steele recommends washing your sheets and all covers, including pillow and comforter covers, once a week on the hottest setting possible to reduce the number of allergens. 

If you have seasonal allergies, use the dryer. “A lot of people like to get that fresh scent on linens by drying them on the outside clothesline. That may be great for the smell, but that is a giant pollen trap,” Dr. Steele says. “Using the dryer is going to help reduce the load of the allergens.”


If your allergies are acting up despite regularly washing your sheets and comforter cover, you may need to kick your pet out of the bed, Dr. Steele says. It could be a difficult transition if you’re both used to cuddling all night, but you’ll ultimately sleep more soundly if you eliminate all potential sources of allergens. No matter who’s in bed with you, it’s worth it to keep things clean.


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