It really doesn't take much "elbow grease" to clean the roof. I use a SOFT bristle brush and a bucket of water mixed with a little "Murphy's". Doesn't take much effort and the roof comes clean easily.
The only difficulty I have is that my wife has to "supervise" while I'm on the roof. If I fell off, it could be hours before anyone came looking for me!
2014 Jay Flight 28 BHBE
2015 RAM 2500 6.4L HEMI, Tradesman 4x4, 3.73
Blue Ox SwayPro (BXW 1503)
Upgraded from an REI internal frame backpack and a Eureka 1/2 dome tent!