My favorite nectar feeders are the ones that stick right to the window. Window feeders are super fun and make it easy to observe birds up close, but a feeder popping off the window is not acceptable. With a couple tips your feeders will stick and stay stuck to the window.
1. Return some elasticity to the suction cups on your window feeder by placing them in boiling water for 2-3 minutes. This will help “reset” the plastic and make it more flexible.
2. Once your suction cups are ready, wash your window. Any grit on the suction cup or window will interfere with the seal. Now is a good time to put up window feeders. Suction cups adhere better to warm windows. Wait until the sun hits the window or use a hair drier to warm the glass.
3. Rub a little finger oil or vegetable oil over the suction cup. Don't use water to stick the feeder to the window. It will just pop off when the temperature changes.
4. Push the suction cups against the window and force out any air bubbles behind the cup. Now you should be set until you want to wash the window again.