We like to open our windows when it is nice out. Unfortunately the bottom part of our window, where the screen fits into, is not very high. So what happens is our cat tends to push the screen out slightly so he can get out through the bottom by pushing the screen out. The screen does not come out per se but the entire frame is pushed out by our cat. I thought about using duct tape, but that is ugly. The lip is just too small to hold the screen in properly. Wedging a piece of wood in there did not work either.