Need great idea for washing my Cougar roof

I know many don't wash them. Along the sides they put regular silicone caulking along that seam where the rubber roof comes over the side. I believe that all needs to be removed and replaced with Dicor. I live on the South Oregon Coast, and our storms here are hard on RVs, especially if they need caulking. Nothing serious yet. I could hire someone, but finding that person with experience can be difficult, and young people don't like to work, it seems. I can remove the caulking (a thin strip) which is coming loose. I am not great at caulking, it won't look pretty but will work, and can do it better on the sides, just need it in front under the bedroom which is the part of the RV that gets the storm winds. I just removed all the graphics (in this case decals) off the front end. The big Cougar cats are wearing off. I wish they would just leave the decals off entirely. I wonder if a rig can be ordered without decals. I took them off the Alfa. OK, I will call around.