How do you clean wheels with drilled rotors? After I wash them there is rust on the rotor which as soon as I drive the car and use the brakes the barrels of the wheel are covered in rust/dirt. I tried blowing water out of holes in the rotor with limited success. I tried wiping the rotors today but there is still some rust on the rotor. Here is a picture before I wiped rotor down. Wheels are open wheel design.