I just take mine out of the helmet when I notice them starting to smell, hand wash them in the sink, and lay them out to air-dry overnight. I did my first winter commute this year and I did notice that my winter skullcap seemed to absorb all the sweat (and smell) leaving my pads in great condition. I may just buy a lightweight skullcap or some bandanas for the warm weather as my winter one is wash and wear - very convenient.