Dr. Bronner’s Peppermint Liquid Soap, $5. Shops will try to sell you fancy, lavender-scented anti-microbial cleaners, but when it comes down to it, you just don’t need those things. Wash your mat only after you’ve drenched it in sweat more than a dozen times and it starts to stink like your feet. When you do, mix a few drops of Dr. Bronner’s into a spray bottle of water, give the mat a good misting, then wipe down with a cloth and lay it to fully dry. Then, take the organic cleaner to the shower or into the wilderness.