Hello, yesterday I washed the car after a little longer interruption and at the same time I noticed spots in many places, on the roof there is also a somewhat longer strip to be seen. If you drive with your finger over the places, you notice absolutely nothing, but it just can not be removed. Do you have any idea what that could be? I put on a picture with, but unfortunately there is not quite so much to recognize, but pay attention to the gray area directly in the middle.