I can't I've ever had this problem. One time, though, I came home from work, closed the door to the apt and went about my business of putting work clothes away and feeding the kitties. Max is no where to be found I looked everywhere. Seems he scooted out the door before it closed and there he was roaming the hallway and finally meowing at the door. From now on I call him the "escape artist" because it's happened a couple of times since.