We believe it is important bird feeding practices. On the top of the list is keeping the bird feeders clean. By doing this on a regular basis, about once a month, it is an easy task. Hoppers, fly-through feeders, nyjer and tube feeders should not need cleaning more than that and our Birds Choice feeders are designed to be easy to clean. Hummingbird and oriole feeders should be cleaned each time they are refilled. Cleaning bird feeders and birdbaths is a crucial practice in preventing the spread of disease between birds. Keep your bird bath/feeder brush separate from any that you use for your own kitchen use.