I modified a dishwasher to wash 16 Perky Pet hummingbird feeders at once. During late summer and early fall it gets used daily. I removed the spinning spray bar and installed a dedicated jet(s) for each bottle and base. I tried to paint the flowers red to keep bees away (bees don't see red) but the paint peeled off even after surface treatment. Some flowers are missing; they were removed for or pried off by our hooded orioles.