Just like your socks or underwear, you should clean your mask after each day of use. Just throw your Enro mask in with your regular wash, we recommend washing your masks in a delicate cycle with a gentle detergent to take as much care of their masks as possible. Your Enro mask is machine washable and dry-able up to 100x. Wash at 100° F/ 40° C and tumble dry low We do not recommend cleaning with alcohol spray because it will wear down the anti-microbial finish more quickly.