I used dawn dish washing soap - I probably didn't "have" to clean the roof, but I wanted to inspect the usual stuff - so I thought I might as well get after it.
I didn't do a great job - but good enough for now. Before - after photos attached.
I also cleaned out the black/grey tanks but I didn't take photos of that
I had trouble with the sensors so used the camco wand dealy. It's a stinky job but somebody has to do it.
2013 Rockwood Roo 23ss
2012 F150 Ecoboost
Camped for 12 nights in 2015 - too many cancellations
Camped for 25 nights in 2014!
Camped for 24 nights in 2013!