 and keep from coming back that won't hurt the roof. So, Will, you took the first step. By getting rid of some of those trees, you'll have more sunlight, and that will have a natural effect, sort of a natural mildew side effect. The other thing that you can do is you can treat that wood with a mildew side. There are a number of roof products out there that will work. Jomax is one. 30-Second Cleaners is another. And these are...