It’s designed specifically for outdoor fabrics, plus works on concrete, tile, wood, plastic, and more. To use, spray the remover, wait until you see the mildew stain disappear, then rinse.
Promising review: “We have a set of vinyl outdoor chairs that were constantly covered with mildew. When we were feeling ambitious, we’d take the time to power wash the chairs, which worked pretty well but was a lot of work. The problem was that a couple of days later, the mildew was back almost as bad as before. With this mildew stain remover, we sprayed the chairs, let them sit for a few minutes, and hosed them off with a regular garden hose. Easy. And they were cleaner than they ever were using the power washer. When we put the chairs away two months later, they were still clean.” —Christine A. Simonson
Get it from Amazon for $10.48+ (available in three sizes).

