I fell into a discussion of how often folks change their bedsheets only to find I'm in the minority. I change mine weekly. Others in the conversation ranged from weekly, to biweekly, to monthly, to "about 5 or 6 times a year." I'm glad they couldn't see my facial expressions. My skin doesn't like it if I sleep on sheets for more than a week or so. It's hard to sleep when your dermatitis is flaring up.