i am wondering the best way to wash my convertible top. so far when i'm washing the car it just seems to clean itself off fine with the splash of the hose. what if it gets really dirty somehow, can you just wash it with a rag like the rest of the car? i wasn't sure if that would ruin it as it appears to have some sort of water proofing. i think i saw a thread like this before i planned on getting one, so i never read it and can't seem to find it now.