Yes, yes, I know. We all wash our bed sheets every single Sunday, right? If you sometimes slack on the bed linens, your face can pay the price.
The price being pimples. While you sleep, dirt and dead skin cells and other ickies wield their way into your pores. Clogging, swelling, and causing a wonderful little breakout.
So heed your mother’s advice. Wash your sheets weekly!
Other culprits in our day to day lives? Cell phones or desk phones held against our cheeks/chins (wipe them down at least once a week with a mild anti-bacterial towelette).