my speedo has something that looks like it had gotten fogged up (inside the glass) and it left faint 'drying' marks inside.

 

I just have to wash my bike and my fuel guage fogs [:@] so it happens to me every Sunday morning

 

Mine do it ( not the speedo or tach, yet ). I always assumed it was just the moisture that got sealed in the gauge when it was built, and condensed when it was real cold. But I haven't noticed it when I wash the bike, but I don't really get them too wet when I do.

 

It's probably the quality of gages they use. Mine started with one now 3 of them do it depends on how humid it is or if its raining. It drys out riding it. I guess they save money on the type of gages they use.