Turning the thermostat up to 5 did the trick. When we spent the winter in Wisconsin 2 years ago, we never experienced this...and it was much colder there. Normally, we keep it set on 2 (out of 5) and things stay very cold. The problem with putting it on 5 is that things freeze in the fridge, so I'm trying to keep it on 4. Jim is gonna hopefully do the light bulb trick to help out.
Thanks for the info!