Voltage gage fogs up

[RWG]

The longer I run the truck, the more the volt gage fogs up. After 2 hours of drive time this week, the gage was unreadable. When the truck is first started it is clear with no sign of moisture. After is sits after driving, it clears up. I don't recall this happining in the past. Truck is a 89 m35a2c, and I have had it for about 8 months.
Has anyone experienced any thing like this?

RG

 

[Cucvnut]

it happens in my M1008 all the time.

 

[Unforgiven]

drill a pinhole in the plastic lens at the top & bottom.

 

[renovate7]

My M151A1 gauges did this as well as one or two of the gauges in my A3.
I was told the gauges were sealed at the factory to make them waterproof. Unfortunately they didn't pull the moisture level to zero before sealing. Whatever moisture is in there turns to vapor when the vehicle/gauge gets hot and then condenses on the cooler lense...What Unforgiven said, drill a small hole in it.

 

[glcaines]

 

[RWG]

Thanks for the advise. I will try drilling the holes and see what the results are.

RG