I simply turn them inside out, take them to my utility sink and spray them with the sprayer to remove all the loose stuff. Anything left behind, I use a scrub brush on. Then I rinse in RO/DI water, air dry. Never had a problem. About every 4-5 months, I'll throw them in the washing machine with the rest of my whites, use non-detergent soap and bleach. (however, I do think that hydrogen peroxide might be a better option)