I know this question has been asked a bilzillion times. Last year I cleaned my rubber roof with B.E.S.T rubber roof cleaner and it made the roof like new again,but the run off stained the aluminum sid...
I used Spic and Span on my EDPM roof just prior to taking my TT in for service. They told me the roof needed cleaning, so I let them do it. and they got it cleaner than I did. I'm no slouch so I need to call them and see if they will tell me what was used.