I currently own a H-146 daysailer & keep it rigged at the lake. However, I have noticed mildew along the edges of the jib as it is rolled up when not in use. I know it has been a rainy season this summer, but what is the best solution to clean this off without damaging and shortening the life of the sail? Is there anything that can be put on the sail cloth to deter future mildew build-up? Any advice would be helpful.