I have the benefit or curse, depending on how you look at it, of being able to see the roof of my camper from my dining room window. The roof needed to be cleaned. Old fashioned elbow grease worked ok, but is there a better way?
Other than "You're supposed to wash the roof?" (@Twilliamson ) or "I have people for that." (@jimbo92 )
I'm hoping I can do it sooner next time and find something to spray on and wash off.