Could anyone offer me some advice on getting the yellow stains off of my awning. I think it is sap but not quite sure. I have soap that takes the black streaks and pink fungus off but it won't touch t...
I got a large bottle of Tilex Mold and Mildrew (16oz IIRC)cleaner. Dumped it into a hand sprayer and added water to make up a gallon. Sprayed it down liberally and rolled it up for about 30 minutes. Rolled it back down and hosed it off, 90% gone so the remainder of the mix got sprayed on it and rolled up again. That did it. I couldn't believe how clean it got it. I had tried the awning cleaner stuff found at rv shops, light use of power washer, and had just about given up.