At the end of the show Splat knocks over the popcorn bowl and glass causing water and popcorn to dump on the table. When the camera changes position you can see a large portion of the popcorn is back in the bowl and the glass is upright with the spill cleaned up.
Kathy tells Liv that she glued everything in the office, including the door and windows, yet they were able to remove the heat duct from the air vent to get out from there, apparently having not been glued.
It shouldn't be possible for a Door to be glued shut, as with Windows.