We have another neat trick! A few months ago someone left crab legs in our refrigerator and the smell was stuck in there. We tried everything, taking it apart, using heavy cleaners, a fresh box of baking soda, and nothing worked. This past weekend, some friends came to stay with us and they had the solution! They had a vomit smell that was trapped in their car and after careful research they discovered how to get rid of it. Get about a cup of grounded up coffee beans, place them in a bowl and leave the bowl inside the refrigerator. Within about an hour the smell was gone!
If for some reason the coffee grounds don’t work I also read that activated charcoal and kitty litter are another alternative.