I've been noticing the front wheel covers seem to have a lot of black streaks on them and when asked mechanic he said it was from the car wash who use the tire cleaner. It's been a month since car was washed and waxed so not sure about that explanation. When looking at inside of tires I saw this on the drivers side. To me looks like something disentegrating. I don't know what that part is. Can someone tell me how to send pics to this forum. Tried but says too big. Don't know how to manually downsize like it says to