My 6.5 old male kitty loves to sit in the windows. Here in AZ, it is now at a temperature to where we can enjoy the windows open in the am and pm. Thespis however, has discovered that he can climb the screens and I cannot get him to stop. I don't want to have to put him somewhere w00h ile we enjoy the fresh air, and I don't want to forgo this short, but most enjoyable time of year....Help please.