Product review (5 stars): This was my last ditch effort and it worked.
tried everything to rid my refrigerator of moth ball smell.  had moth balls in garage and the air exchanged into fridge and freezer.  when we moved, the smell still didn't go away after 3 months of trying baking soda, soap and water wipe down. then put activated charcoal bought from here on paper towel in empty fridge and freezer compartments.  still nothing.  no actual food was in fridge this whole time.  after 3 days with this deodorizer, one each in fridge and freezer, no smell.  i am amazed.  was about to get rid of the fridge.