To clean a hummingbird feeder, use hot tap water and a bottle brush each time the feeder is refilled, and use a bleach solution to completely clean the feeder once a month. Get rid of any signs of mold in a hummingbird feeder with instructions from a professional wildlife biologist and naturalist in this free video on bird feeders.
Bo Brown is a professional wildlife biologist, naturalist and wilderness survival instructor. He has worked as a biologist since 1985 and is currently associate director with Ozark Center for Wildlife Research Inc. and founding director of First Earth Wilderness School LLC. Since 1985, he has worked as a freelance avian wildlife biologist around the US and Central America on various avian research projects with federal and state governments, universities and private companies.