We have a 2023 Winnebago View. On a recent trip, there were a flock of sea gulls in the RV park that did a number on all coaches, including ours. Got the sides cleaned up. When we got home, I put out the awning and discovered that it had a lot of poop on it and when it rolled up it got on the underside of the awning and stained it. I've tried a few different cleaners to no avail. Does any one have any suggestions on how to get rid of the poop stains on the vinyl???