The short winter days are perfect for finding things to do in the house. Even a self-defrosting fridge or freezer needs to be cleaned thoroughly once in a while. Empty the fridge and freezer (Set stuff outside if the temps are low enough!) and turn it off. Allow it to warm and defrost before scrubbing it down and restarting it. It will take about 24 hours to reach its optimal temperatures, but reloading your cold food will speed up the process.