Hmmm - maybe I should get myself a vending machine route part time.....
Might be able to retire early.
Here's what I would do: get one of those tape measures that is metal but flexes. Extend it to 3-4 feet and put it through the slot at the bottom, and jiggle it around to pull off that snack you were cheated out of. (I've used this for another problem I had at home once, but I shouldn't say what that was....
.)