Well I am about to pull off my Tires and Wheels and put a free sign on them. I have been battling this issue for months and i have used every product on the market to clean them. I could have bought a new set by now lol. As you can see by the picture I am getting those streaks after every rain. I am convinced they are not coming from the tire but getting there from somewhere else. I have even taken off that ring around my wheel and cleaned behind it thinking maybe brake dust was built up. Any ideas????