Others can't see it, but if what I see you are in New Hampshire. If things had worked out differently many years ago I would have been working for Brookstone.
I understand your issue although I live in a much more moderate climate. Let me explain:
In the early days of contracting I saved every ounce of paint not used as a service to my customers. I ran out of room in a climate controlled area.
I went out and bought a sheet of 2" thick pink styrofoam and built a large pink cooler. Just used duct tape to seam the corners. I put my paint in there along with a five gallon water jug. I bought a 100 watt aquarium heater that had a separate thermostat sensor on a cord. The heater went into the jug, the jug top got sealed and the probe was placed at the top of the "cooler" Set the temperature to 80 degrees, put the top on and put something heavy on top to keep it sealed.
It worked great. Things never got too hot. Didn't waste electricity because it cycled on an off. The mass of the water and the contents minimized temp swings and no freezing.
In your situation if you did similar there would not be the chance for condensation until you removed that tool and used it in the cold.
Just a thought.
Peter