[dutchmensport]

In the past, on all my previous campers, I've always washed with Dicor RV roof cleaner and conditioner. My current 5er has an Alpha roof system, and "the books" say it can be washed with any mild soap solution or Spick-n-Span. I washed it only once now in 3 years and I used a mild Dawn Dishwashing liquid solution and a soft long handled brush. Rinsed with a lot of water. I then followed up with Rubber Roof Conditioner per recommendation of my RV dealership service department. I was amazed how much and how quick the Rubber Roof Conditioner got sucked up into the rubber, and then how smooth it felt when it dried. I did this about 4 weeks ago.