In my opinion, this is the best, and easiest, rubber roof cleaner. And the same company makes a conditioner as well. ProtectAll Rubber Roof Cleaner. Made my old rubber roof look like new.
Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD 4dr short bed Duramax w/allison
Reese Fifth Airborne air ride king pin coupler with Sidewinder