My daughter has a tiny KSB in a 5 gal aquarium with a sliding screen top with aspen bedding, a water dish & no other decorations. The tank is at least 4" taller than the snake is long but somehow the little magician managed to escape? Not only did he have to reach the top of the tank but then squeeze through the screen lid?
Complete Mystery?
We found him shortly after in a bag of bedding located on the floor below the shelf it was on.
Maybe put a shallow dish of aspen on the floor in the area?