- Change the nectar frequently.
Daily is not too often! But if you don't change it daily, change it every 3-5 days. If temperatures are high or the feeder is in the sun, change it more often. If the nectar is cloudy or if you see black spots, change it.
- Make sure the feeder is squeaky clean each time you refill.
Any mold or bacteria left over from previous fillings will taint the new nectar and it will go bad fast.
- Do not add fresh nectar to old nectar.
- If possible, hang the feeder in a shady spot.
Nectar in feeders in the sun will go bad faster. If a shady spot doesn't work for you, try a rain/shine guard over the feeder.
- If you're throwing away a lot of nectar, don't fill the feeder full.