Long story short, I have a Frigidaire refrigerator with freezer on top. The people that sold me the house left the refrigerator in the garage but had unplugged it with food inside!
The food thawed and the slime dripped into the area where heater mullion is located. There was a strip of insulation that was between the heater and Styrofoam insulation of the freezer. I had to remove this insulation because it was saturated with smelly slime, I then replaced it with a strip of cardboard. I'm now a little concerned that the cardboard might smolder or ignite. Does the heater mullion get hot enough to do this?