We were looking at our awning that has a little mildew. Someone at a campground told me that he uses a 50% mixture of Simple Green in a spray bottle. He then roles the awning up for 30 minutes. After ...
I use tilex. Its the bleach that does the trick. Spray it on both top and underside, and roll it up for an hour or so. Unroll it, scrub the few stained spots, and hose it off. Looks as good as new.