Some days I love the excuse a wizard did it.
The last time we saw the freezer (Cafe Gruesome 005) there was a big round ice block, that's where the sprites live and they don't like it when messes with it.
Then how do they use it? Well, I presume they dont, judging from some cases. A wizard did it is a very useful excuse and one that, even with my 50 strips ive used it quite a bit. It has loads of variations too,god,author,time-spacial rift,etc,etc
The sprites don't like when someone messes with the big round ice block, not when someone uses the freezer.
Its the idea of the thing!