wapiticountry wrote:
An evaporative cooler will make things worse, not better. It would counteract the air conditioning system that actually removes moisture as part of the cooling process. What might help a bit would be to spray the outside of the rig with water occasionally. The tradeoff would be a whole lot of hard water staining. Covering the windows with reflective sun shades and having the AC units cleaned and serviced would be my first steps.
You misunderstand. I'm suggesting misting the condenser on the roof. No humidity would be introduced to interior of the RV.