I use a hand propane self lighting torch. The torch will burn clean everything without contaminating the hives protective system of Propolis. I may kill a few bees which do not set the hive into defense mode. I can clean out corners better than I can see of virus, fungus, mites, wax worms, spider and webs, mice and their waste odor, and cleaning the screen at the bottom is easy. Michael Housel Orlandobee :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -- Visit www.honeybeeworld.com/BEE-L for rules, FAQ and other info --- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::