QUICK TIP: Reader Bruce Davis says he had good results cleaning fungus from an asphalt roof with a product called Wet and Forget, which must be one of the safest and simplest to use of all roof cleaners. For more details, prices, store locations and so forth, use a search engine and the words Wet and Forget Outdoor. Wet and Forget is simply sprayed on the roof and allowed to work — no scrubbing, rinsing or other steps. It is also said to be free of bleach and lye. Plants still need some protection. Davis said “it can take a few months before you see results, but it does seem to be effective.” Any do-it-yourselfers who attempts roof cleaning with any product should keep in mind that roof work, especially wet roof work, is dangerous, and should not be attempted without proper safety equipment including a body harness to prevent falls.