Maybe it’s specially monogrammed. Or it’s your favorite cat print. Still, if your mask has tears, holes, or is worn, sprung, or soiled beyond help, it’s time to retire it. To make your masks last longer, don’t let them get wet from saliva, sweat, makeup, or other stuff -- the fabric can get moldy if not washed ASAP. (Also, damp masks don’t work as well.) Stash dirty or damp masks in a plastic bag until you can wash them.