Americans sleep an average of 7.7 hours a day, according the U.S. Bureau of Labor. That’s a lot of mattress time. And the caliber of that sleep depends a lot on your mattress — mainly its quality and how well you take care of it. Once you’ve bought the right mattress, you’ll want to know how to properly maintain it. “Taking proper care of your mattress will help you to protect your investment and promote better sleep,” says Lin Enilk, a representative of the American Sleep Association. Here’s what experts say about cleaning and caring for your mattress.