Numerous suggestions in the past are cleaning it real good with vinegar, or a bleach mixture, or favorite cleaner, then setting a plate of unused coffee ground in it, or wad up a bunch of newspapers, stuff them in and shut the door for a few days. Search this forum and you can find an assortment of suggestions. I left my house fridge last summer for my daughter to go through and take what she wanted and she was to discard the rest. Came back in the fall to a very messy bag of broccoli. I just scrubbed the interior real good and put a box of baking soda. Took a few days (or maybe we just got used to the odor.)