Feed only as much food as your birds will eat in a day. It's important to keep feeders perfectly clean to avoid spreading avian diseases. Every few weeks feeders should be scrubbed and rinsed. Allow feeders to dry before refilling. If you provide suet, reduce the amount you offer in hot weather.
Heat can make suet rancid and unhealthy for birds.
Runny suet can also stick to birds' feathers, making them hard to keep clean and useful. Use rendered suet or heat-resilient suet blocks that are available commercially. Change the nectar in hummingbird feeders at least every few days, more often in hot weather. Wash them thoroughly with hot soapy water and rinse completely every time you refill them. When cleaning hummingbird feeders be sure to clean the feeder ports well.