My hamster Ritz was an escape artist too! One time he popped his water bottle out and chewed a hole in the plastic cage and squeezed out of a tiny hole! We didn't even know he was missing that time until we found his clue. We had vacuumed the room the day before, and in the morning next to the couch was a pile of dust. We were confused about where it came from since the room had just been cleaned, when we realized Ritz was missing! We lifted up the couch and he had chewed a hole in the lining and was taking a nap! The pule of dust bunnies was from him squeezing under the couch and kicking the dust out! He escaped two other times. Once we found him in out heater (thank God it was in the summer!) and the other time he just crawled over my feet!