Things You'll Need
Instructions
Bring one part sugar and four parts water to a boil in a medium saucepan. Stir the mixture well to ensure the sugar dissolves.
Boil the sugar water mixture for two minutes and remove from heat. Boiling the mixture will kill any mold spores present.
Cover the sugar water solution and allow it to cool completely. Pour the sugar water into the bird feeder and hang it back in your yard.
Check on the hummingbird feeder daily to make sure the sugar has not fermented. If you see signs of fermentation, immediately replace it because the hummingbirds will not eat it.