I have had two different coaches with the FWS, in a hard and blowing rain, if the coach was parked and level, both would at times accumulate enough water on top of the slide as to when it was brought in, would dump significant water off of either end inside the coach to be a problem. Here is what I have done; since we now are advised by Newmar to extend and retract the slides while at ride height, I have adjusted the "auto level" to "level" the coach with the front slightly higher than the rear, this prevents water from accumulating on top of the slide out as well as draining all the water on top of the coach to the rear. When leaving CG hit "store", come to ride height, pull in slides, unhook and you are ready to roll. No more fooling around with the "manual" level to try to get water off the top of slides