i keep them covered up with bartowels when i'm not using them, and i wipe them down with dry microfiber towels like these: http://www.amazon.com/AmazonBasics-Microfiber-Cleaning-Cloth-Pack/dp/B009FUFBTG/ref=sr_1_15?ie=UTF8&qid=1420679472&sr=8-15&keywords=microfiber+towel

i use those to clean everything now, if they don't work dry just get them slightly wet and they'll clean anything.