Hello TheTraveling Browns !
I recently cleaned ours and applied a protectant as called out in the owners manual. The products are made by Dicor RP-RC-1GL Rubber Roof Cleaner and RP-RG-1ZGL Roof Guard Protectant Spray(UV protector). while my roof is still very new, the cleaner did a good job(in my opinion) and I followed up with a coat of the protectant.
Be careful up there ! Things can get slippery!
Take care.