I had the same issue, and suspect it was from drying with the airforce blaster. the spedo is a sealed unit but its not water tight, it only has a gasket around the edge where it mounts under the console. It can handle rain and washings but did not like the dryer pushing water around it. so you either live with it or you will have to have the dealer replace it to certify the milage.TomD said:My 04 Fatboy develops condensation in the speedo and is leaving a pretty good film on the glass. I've had it out of the bike and didn't see a way to open and clean it. Any tips?