All my snakes are in Zilla Critter Cages and the only time I eve had one escape was human error. After putting the snake back into the tank I didn't put the lid on right away. I turned around to get the lid and then slid it back into place. I didn't see the snake but thought it was normal since I just fed her. The next day I just got this nagging feeling and decided to look for her. I dug around and eventually removed everything and she was gone! I found her 3 days later in my closet. But apparently she escaped in that sort time that the lid was not on. Maybe this is what happened to you?