I have a 25th anniversary, 2000 Goldwing. The dash panel is discoloring, with a half circle dark grey taking over from right to left on the center panel between speed and rpm gauges. It is blocking the view for radio stations and other information. It appears to be a circle of grey about the same size as the rpm circle to the right. Seems to be moving to the left over time. Wondering if others have had this problem and if any suggestions?