EllisoJo

In my opinion, a wet vacuum cleaner with the sort of small nozzle for upholstery is a good idea. There is no guarantee when "rinsing-off" cleaner that all of the dirt, algae etc. will be lifted off/out of the fabric. The wet vacuum will rinse-out the cleaning liquid AND all the muck, before using Renovo or whatever. It certainly worked well on the second-hand hood (with glass rear window) which I purchased. It was quite dirty, with lots of green algae. It now looks pristine.