I have an 09 Ultra and after several washings there is a white residue that is building up on the inner black plastic part of the fairing. I shows up on the lower areas where water can get caught and then dries. Even if I soak it up the white shows thru. I have tried to remove using vinegar, but to no avail. I almost looks like mineral deposits from my well water?? Does anyone have any suggestions as to how to remove or cover this up? I wonder if the inner fairing could be defective?