I use what ever the wife has for cleaning the bathrooms if I can sneak out of the house with it
Usually, it's Fantastik Scrubbin bubbles, which works pretty good. I'll wet the awning down, spray the cleaner on, wait a couple of minutes, then scrub it with a sponge mop, or swap to a brush head if needed, then rinse and dry well before rolling it back up.
David