I have 2 leopard geckos, they are sisters, and their housed together in a 20 gallon tank. I haven't had any troubles with them until now my one leopard gecko Lily after cleaning the tank has all of a sudden decided she doesn't want to be in it anymore and I don't understand why. Nothing has changed nothing at all, can someone please help me understand why she's all of a sudden climbing the walls, she has never done this before except for when I first brought them both home. The tank is set up properly I can assure you. There's 4 hides, water, food, a warm side and a cool side at the temps they're supposed to be and 3 out of 4 sides of the tank are covered so they feel more secure. So what gives?