 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 products that you can use a spray hose applicator with. So you just kind of shoot the roof and saturate it and let it work for a while. It's not an instant thing. What it's doing is killing the moss, and then sort of Mother Nature releases it and washes it away. The other thing that you can do...