My son has a air conditioner window unit in his window because he is hot natured. One of our cats has become a diva compared to the other two cats. She has started making noises outside the air conditioner in his room between 4:30 and 5:30 a.m. He hears scratching, meowing or whatever she can do to get him to let her in. He will let her in just to get some sleep. She will usually stay in from those hours until about 5:30 p.m. when she goes out for the evening. The other morning, she was scratching and he was hitting the air conditioner with his hand to get her to stop because he didn't want to get up to let her in. All of a sudden, he felt a cat on his face. She had opened the side panel between the air conditioner and the window frame to let herself in. This afternoon we returned home to find that the panel was open again. We could not remember if we left her in or out when we left the house. She was in when we got home. I laughing joked that we were going to have to have some kind of a "Missy" in and out flag for when we leave the house. Heaven help us if the other two learn this trick. Actually, we are going to have to figured out something to keep her from moving the panel. She is definitely a diva furbaby.