I don't, unless there are big 'ole chunks of somethin on there, I just leave it until I'm home. Now if you're on an extended trip and leaving would lead to rust etc, I would just bring along the head of a toothbrush and maybe some type of CLP(cleaner, lube, protectant) rem oil, wd-40 etc. although if you can get it a teflon based lube would probably be best