In my 06 Roadtrek I'm finding out it's pretty common to have leaks from rain and below the AC unit. Now that I'm getting ready to sell it, do the stains/leaks devalue it?
We have successfully used OxyClean on water stains. Mix the powder in some hot water to dissolve, put in a spray bottle and apply. Let it work a few minutes and wipe off. You might need to wipe several times as it sometimes leaves a white deposit when dry. Stains just disappear!