Remove seed tray and unscrew nut. Hold feeder in position on outside of bird cage, with screw post protruding through the cage bars. From the inside, screw nut onto screw post. Do not over tighten. Place seed tray into position (make sure it clicks into place). Check that the outflow opening of the seed tray chamber is pointed toward the seed tray. Fill the chamber with seed. Important: Before removing the seed tray for cleaning, turn the seed chamber .25 turn to the right to stop seeds from flowing out.