Great topic. I've had such problems with my refrigerator smelling and tried the baking soda, vinegar, rolled up newspaper and even tried charcoal briquettes from my BBQ. Nothing worked very well.
After reading the earlier comments about fridgeIT odor absorbers, I checked out the company blog which has lots of interesting ways to use activated charcoal. Lots of people seem to love fridge It, so I ordered from them on line and got it really fast which I was impressed with. Bottom line - these really do work. I'm so impressed and have even convinced some friends and we are all now fans. Now, we are all finding new places around the house to put them. So, I definitely recommend these activated charcoal odor absorbers and grateful that my fridge does not smell anymore. Yeah!