I have Faria gauges and when I go out early in the moring three of them fog up. Once the sun comes out and heats them up they are fine any ideas on how to prevent this or fix it.

sometimes I turn my nav lights on and it helps.

Don't go out early in the morning

Its condensation, just like what you will get in a thermopane window in your house if it has a leak. Basically, there is a leak in the seal and air has gotten into the guage. Not much you can do except get new guages.

My Gaffrig oil temp gauge does the same thing.

If you're the original owner of those Faria's they are guaranteed for life. (unlike the "G" guages)

wish i was i am the 3rd or 4th owner not sure