Just blow them out with compressed air after each section during use. When done, blow 'em out with compressed air, shoot 'em with some PB Tornado pad cleaner, let sit for a minute, throw in bucket with some APC or Dawn and water and give 'em a little scrub with hand. When done with job, toss in washing machine with HD Towel clean and wash 'em then lay them on rack (velcro side up) to dry. Likely not textbook but easy enough and no ill effects seen yet.