Hard water stain
I think I saw the answer to this once, but can't find it now or remember the solution.....When running the rooftop AC, water will trickle off the roof(normal) and run down the side of the coach leavin...
Forum Discussion
In my experience with my 23 year old MH if you keep the unit waxed the water stains and black streaks come off easily with a sponge and water.
