Use Charcoal to Control Food Odors
Here's a foolproof way to keep your refrigerator from absorbing strong smells and smelling like leftover food: charcoal briquettes.
Grab a few briquettes from the bag by the grill and put them in a bowl in the back of your refrigerator. The charcoal absorbs any odors—just change them every few months. This method beats baking soda.