However, you can prepare your own solution with 1 part white granulated cane sugar to 4 parts water. Boil the sugar solution to help dissolve the sugar, then allow it to cool before filling your feeder. Try to place feeders where rain will not dilute the nectar in the end of the tube. Also, avoid direct sunlight as heat stimulates bacterial growth. The sugar solution must be kept fresh.
Hot weather can cause harmful bacterial growth in feeders.
To avoid bacterial contamination in your feeder, change the solution every 3 - 5 days, and clean the feeders with hot water and white vinegar. Do not use soap or bleach. The drought may go on all summer, but if the hummingbirds are visiting your garden or feeder maybe you can still smile while strolling across the crunchy brown grass.