Now that the weather has cooled down, my 75% white cat loves to roll in the dirt. I need to either 1) stop it (which I don't think can happen), 2) clean him easily (he's pretty clean by the next am except for his neck area) and/or 3) prevent him from getting dirty in the first place (I use ShowSheen (silicone) on my horses to repel dirt but it may be harmful to cats because of licking). He looks like a stray. It's embarrassing! Any suggestions?