We wash our clothes, we wash our dishes. Why wouldn't we wash our helmets? My last helmet died a premature death from intense funkification. I'm determined to get my moneys worth out of this new helmet. About once/week I've been spraying it with Simple Green, letting it sit for a few minutes, then rinsing it with a hose. I know some cleaners could harm a helmet. If so, I could go to using something like shampoo diluted with water and applied with a sprayer.
I've also started wearing cheap doo-rags under the helmet. They seem to help.
I am a profuse sweater, so even on cool days I can easily drench my helmet with sweat and oil from my scalp.
Does anyone else wash their helmet on a regular basis? I would think they would supply washing instructions with helmets just like they do with clothes.