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 ...
On the stains that will not come off using the suggested method try a little elbow grease and a Mr Clean Magic Erasure. Be careful as the sponge is abrasive and can damage the awning if you scrub too hard.