Empty nectar from the feeder every two or three days. Thoroughly clean and disinfect feeder, and clean out feeding portals with a brush. Avoid using honey as a source of sugar in your feeders. Honey can become contaminated with a potentially deadly fungus that can kill hummingbirds.
You may store unused nectar in the refrigerator for maximum freshness.
If you attract even a single hummer to a feeder, chances are that you will be feeding these beautiful creatures for years to come. Others will follow the first one to the feeder. More and more will come each year if you continue supplying food.