I left jugs of water out in the cold and stuck the ice in the refrigerator and the stuff in the freezer melted (the ice was not colder than the ice cream so there was no point in adding ice there)
This is plan B. ...
Step 1: Tools
I would have used a table saw with a fence or a hot wire cutter.
Other saws are too messy.
even on this scale planning helps
Step 2: As you can see I use a masonry blade
Thus, I made the area needing cooled smaller.
I was concerned about blocking the thermostat (I don't know where it is). so I left space near the walls
Unless you are going to try the obvious alternative: packing peanuts in a bag (free, quick, easy)
the rest of this insrtuctible is how one guy cuts foam.
I measured from the lip of the shelf to where the glass ended on the chance that air needed to pass behind
the foam I found was 4" thick That meant I would need to cut into it, flip it, and match the cuts.
even though I could fill more space going 4" wide stacking blocks like books , I went 4" high and stacked 2 high
I I should have used a darker marker
be warned the blade gaurd is spring loaded and will catch and tug the blade enough to screw-up your cuts
it is the heat from friction that does the cutting. keep moving
As planned, I cut one side first
then I stuck a knife carefully through the inside corner I set the foam on edge and cut using the slot I had just cut as a guide