I have a class A with a fiberglass roof. I park it along a tree line in the summer & inside in the winter The roof is black on about 25% of it. I got up there today with a bucket of oxyclean mixed ...
This is the first year it's ever been this bad. I wash it every year, I had no idea it was this bad. I've used Tile X in the past, but this year it's so bad it will take gallons to get it clean. I had to wash the vinyl siding too, that was a first, it's been there 15+ years. Must have been a bumper crop for mold this year