New for 2005! Hummingbird and Oriole Feeder Cleaner - Revolutionary! Our natural enzyme-based formulas biodegrade organics in birdfeeders. Gone is the dark ring of organic vegetation - scum lines where it is very difficult to scrub clean. Our enzymes work at problems that literally disappear; leaving clean glass walls, unclogs dipper tubes while preventing scum and waterline rings. Provides perfect nectar water with no residue. Application: Varies according to type of feeder