Using this window birdfeeder is easy. First, find a good spot on your window where you can easily see it. Attach one of the heavy - duty suction cups to the window and use the horizontal level indicator to make sure the feeder is level. Once it's level, attach the other suction cup. Then, fill the main part of the feeder with 1 lb. of sunflower or wild bird seed. You can also fill the middle compartment with water or fruit slices to attract more birds. When it comes to filling the seed, just slide out the seed tray, add the seed, and slide it back in. Make sure to clean the feeder regularly. You can use warm soapy water to clean the plastic parts. Check the suction cups often to ensure they are still sticking well to the window. If the drain holes in the seed tray get clogged, use a small pin or toothpick to clear them. Enjoy watching the birds!