Condensatin drip or Chinese Water Torture

When my rig is leveled the condensation from the heat pump goes directly down the center of the fifth wheel from the unit rearward where it forms a pool in a depression at cap seam ridge, then overflows the seam ridge and drips over the rear roof edge onto the horizontal surface of the fiberglass at the back end of the trailer. This creates two problems. First a moldish slime forms in the pool and secondly the dripping is driving me nuts (which is a short trip).
I have thought of using Dicor or some such caulkish material but don't really want to do that. Has anyone come up with a good solution to redirect the water to the rear edge overflow scupper??