When you buy your feeder, read the packaging for its recommended cleaning methods. Some feeders can be washed in the dishwasher; others must be washed by hand with dish soap and warm water.
Sugar water attracts mildew, so each time you refill your feeder, check the feeding ports for mildew. You can purchase tiny brushes to clean the feeding ports or use a pipe cleaner to scrub inside.
If you refill your feeder twice a week, you can wash the feeder one day and simply rinse it with warm water the other day. Be sure to check for mildew or bird droppings each time.

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