My window feeder keeps falling off!

Sometimes the rubber suckers curl when not in use and need to be flat to work. We’ve found putting them in a warm spot (for example direct summer sunshine or atop a hot water radiator) with a small weight (hard back book etc.) for a few hours works a treat. Also the window itself and rubber suckers need to be completely clean and dust free. Then simply wet the rubber suckers and press hard against the window for a few seconds. The feeder should then remain attached to the window permanently, easily capable of holding bird food and feeding birds.