After some time, the wipers have the disc sanded rough. It is enough for dirt in the air. When you wipe, then pulls the wipers as a film to be milchischen. As you drive something like blind. This means closes the pores again, making the disc again smooth.
It is important that treating the disc before with a glass polish. I take from Sonax. The polishing agent is washed off at the end, the plate dried and then it means.
Most of the impregnation holding 1/2 year. I am not a frequent traveler. The more I wipe, the faster it is again rough. That means I work with a palm of my hand by circles in the Write, with the rag, it did not go so well. After the write looks slightly smeared. A cycle with the wash water over it and exit.
