GordonThree wrote:
Cooking means a few windows wide open and a vent fan if you have it.
If you can see condensation, it's even worse where you can't see.
An RV is like your bathroom in a way. Take a shower without the vent fan on and moisture collects on the windows and walls. An RV is sealed up pretty well (or should be) so it's imperative to run the vent fan (Fantastic Fan) when cooking or boiling water. The steam needs to be sucked out. Window open, fan on, always.
A picture would be nice because it sounds like there are other issues going on.