Yes, You Do Need to Wash Your Fabric Face Mask After Each Use
How Do I Wash a Cloth Face Mask?
Follow the CDC's guidelines for cleaning your mask. If you have a washing machine, you can wash the mask with your regular laundry, using detergent and the warmest setting possible. If you need to wash cloth masks by hand, soak them in a bleach solution for five minutes before rinsing. (You can add the bleach to water, but avoid mixing it with any other chemicals, like ammonia.)
"I advise my patients that it's OK to place the face covering in the dryer, but make sure that you dry at the highest setting," Dr. Sevilla said. "For air-drying, lay flat the face covering and allow it to dry completely. If possible, place the face covering in direct sunlight."