Believe it or not, your bed might not be as friendly as you think it is, especially if you don’t regularly change your sheets. If you frequently wake up from a good night’s sleep with a new zit or two, your pillowcase could be the cause.

With repeated use, your pillowcase builds up all kinds of dirt that can clog your pores and lead to acne. Conditioner residue after a shower, scalp oils and grease from your skin can all stick to your pillowcase. If you’re allergic to dust mites, an unwashed pillowcase can even make your eyes red and puffy.

Experts recommend washing your sheets and pillowcases once a week – more if you’re prone to acne. Use hot water to make sure you’re killing any bacteria that may be present. It’s a good idea to wash your face before bed (if you don’t already). A product like Exuviance – Moisturizing Antibacterial Facial Cleanser will make sure your face is clean. Wash again in the morning.

If you do happen to wake up with a new pimple, use a treatment concealer like Jane Iredale – Disappear to cover it and get rid of it while you go about your day. Problem solved.