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Fill the hummingbird feeder with nectar made from sugar and water. Clean the feeder with vinegar and warm water once a week. Rinse the carafe with warm water and refill the feeder. Keep ants away by filling the feeder’s ant moat with water.
Pour 4 parts of water into a saucepan on your stove and set the burner on high. As the water warms, add in 1 part of white sugar. Bring the water to a low boil, and let it boil for 2–3 minutes so the water and sugar blend. Then, let the water cool for 30 minutes, and pour it into your feeder.  The size of the carafe varies from one hummingbird feeder to another. Only make enough nectar to fill the carafe of your feeder(s). If you make extra, you can store it in the refrigerator. The nectar will only keep for about 1 week, though. Never use honey or artificial sweeteners in your nectar, and never give hummingbirds commercial foods that contain red dye. Due to the high sugar content of the nectar, the feeders get dirty quickly. To clean them, mix white vinegar and warm water at a ratio of 1:4. Dump out the old, dirty water, and pour in about 1⁄2 litre (0.13 US gal) of the vinegar solution. Place the lid back on the feeder and shake it vigorously to clean out the feeder. If the inside of the feeder is especially dirty, drop 12–20 grains of rice in along with the vinegar mixture. The rice will scrape stains or moldy patches out from the carafe. Once it’s clean, rinse the feeder out 2–3 times with warm water to remove all traces of the vinegar mixture. If any vinegar is left inside, birds will stop drinking from the feeder. Then, refill the feeder with another batch of sugar water for the birds to eat. Hang the feeder again, and watch as more of the beautiful birds come by to drink! Ants are a problem for all hummingbird feeders, but get especially bad with suction-cup feeders, since ants have easy access to them. Prevent ants from accessing your feeders by filling up the feeders’ ant moat with water. The ant moat is a 3–4 in (7.6–10.2 cm) wide trough that goes around the feeder. When ants attempt to get to the sweet nectar, they’ll fall and drown in the moat. At least once a week, scoop the ant bodies out of the ant moat and dispose of them.  Most saucer and J-hook feeders have ant moats. Suction-cup feeders often don’t, since the moat would be unable to wrap all the way around the feeder. If you’re concerned about ants and wasps getting into the nectar and bothering the hummingbirds, purchase a bee guard that can be attached to the feeder. Most hardware stores sell bee guards.  Never fill the moat with oil. Small birds will drink from the moat from time to time, and the oil could harm them. If you don’t take preventative steps, you’ll soon find that your feeder is full of drowned ants and that the birds are no longer drinking from it.