Be sure to begin with a clean hummingbird feeder and wash well in between refills. Most feeders are red or have some red coloring on them to help attract hummingbirds. If not, simply tie a red object to the feeder, such as a red ribbon. Use organic sugar whenever possible and always use clean, filtered water.Use only real sugar, no artificial or even natural substitutes. Refill the feeder weekly, and more often on hot days. Bees and ants are often attracted to the sweet solution, so be sure to clean up any spills as soon as possible.