The question has come up on here before about the proper way to clean acrylic awning & slide topper fabrics. I call Chris at Stone Vos to get an expert opinion on this. This is what he recommends.
1. Clean the fabric thoroughly using a very mild laundry detergent such as Ivory Snow, and a soft-bristle brush.
2. Rinse thoroughly
3. Let it dry for a couple of days
4 Spray with 303 Fabric Guard, NOT
303 Protectant! This restores the UV inhibitors that was in the fabric when new.
If anyone wants to perfect their technique just come on by!