There's probably a thread on this, but I am having some problems with the search engine today. I am looking for techniques on washing the back side of wheels. It seems that these days the clearance between rotors and wheels is so small that trying to get a brush in there is quite difficult, and if you do get it in there scrubbing action is hard to achieve. Anyone have any special techniques for washing in this area? In between the wheel and the wheel well also on sportier cars with little clearance in this area also. Maybe this is why so many people are fond of wheel acid.