I have a black jeep...and everytime i get mud on it and try to just wash it off it leaves waterspots EVERYWHERE. So then i'll get out the towel and wash it realy well with soap, water, and a sponge and towel dry it. But i do this and a few hour later it ended up raining and left, who woulda guessed...WATERSPOTS. I really didn't feel like spending an hour or two washing it again...so i just left it, but it looks SO BAD. Does anybody know how to keep these off?