• Unplug the freezer and wash the interior walls with a solution of two tablespoons baking soda per quart of warm water.
• Pour activated charcoal or baking soda onto jelly roll pans and place in the freezer in two or more areas. Run the freezer for several days. Activated charcoal can be purchased in stores that sell aquarium or greenhouse supplies. The charcoal will become saturated with the odor but can be reactivated by heating in a 300 degree oven for one hour. Try this method for about 10 days.
• Pack the freezer with lightly crumpled newspapers. Sprinkle the newspaper with a little water. Replace the newspaper every day or two. Allow the freezer to run for approximately five to six days.

If these methods do not remove the odor, it may be that wet drippings have seeped into the freezer's insulation. This problem requires service by a technician who may have to remove and replace the insulation.