How often should you wash sheets?

Wash your sheets about once a week. While you sleep, they collect sweat, body oils, dead skin cells, and dust mites, all of which build up quickly. A weekly wash keeps the bed hygienic and feeling fresh, and it can help skin and allergies. Stretch it to every two weeks at most if you shower before bed and the sheets stay clean. Pillowcases benefit from even more frequent washing, since they touch your face directly.