Any soap product that you have to rinse off the roof has the potential to remove wax from the sides of your RV, usually in streaks.
I have had great success with Protect All rubber roof cleaner followed by the conditioner/treatment.
You spray it on, mop it off using a bucket. Nothing goes over the side and is easier/quicker than scrubbing with a soap product.
https://www.amazon.com/Protect-All-R.../dp/B0002UHVSW
More details on usage from the Protect All site:
https://www.protectall.com/shop/rubb...care-products/
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Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD Duramax
Reese Fifth Airborne Sidewinder