What’s On Your Mind: How Often Do You Wash Your Sheets? Bridge Street Posted: Aug 2, 2021 / 12:46 PM EDT / Updated: Aug 2, 2021 / 12:46 PM EDT How often do you change your sheets and your pillow cases? A new study suggests that on average 2-percent of people never change their pillow cases. So what would you do? Share your thoughts with us.