I washed mine about 4 weeks ago and used Rubber Roof cleaner from my local RV parts store (dealer). I am one of those fussy-duddies that believes in using the product that is made for a specific function. Costs a bit more? Yes, but then there is no threat of using a product that may, or could, over time, cause the roof to deteriorate.
The last time I washed was last Fall. Although the roof did not look dirty, when I began washing, the dirt rolled off. Amazing. It came nice and clean again.
I then followed up with the Rubber Roof Conditiner. Now ... I was up on the roof barefoot (shoes were too slippery). Before using the conditioner, the roof had a rough texture to it. I didn't think too much about it. But after the conditioner was put down and dried and I walked on it, I was amazed how different the rubber felt. It was smooth and soft again. (and slick).
You can use what you may, each one of us has the freedom to use what we think is best. But in my opinion, the product made for the job is the one that works. I really saw the difference after applying the conditioner.
