Wash your sheets to avoid an infection.
Dead skin cells, sweat, saliva, and more can turn your comfy bed into a petri dish for germs to grow. For instance, lab tests found that swabs from pillowcases unwashed for a week harbored 17,000 times more colonies of bacteria than samples taken from a toilet seat. (WebMD)
That sounds gross!
Wash your sheets! Especially if you're having facials, treatments or permanent makeup done. Afterall, you spend 1/3 of your days in bed.