If I recall someone asked the instrument maker who claimed it was the heat from the light bulbs that is the problem. It raises the temperature of the air inside and moisture then condenses on the cold glass. Heated instrument glass would solve the problem crazy3

They said it does not occur with more modern instruments that use LEDs. I can't imagine why they have not changed to LEDs if that is the case.

Has anyone tried fitting LEDs instead of the bulbs?

Peter

[Linked Image]