SCOE 10X works VERY well. It got rid of a raw rotten chicken smell in my freezer. The electricity went off for several days while we were on vacation last July when it was HOT. Oh, the smell in my fridge and freezer!!
It gets rid of urine, vomit and skunk smells too. You can buy it online. Just follow directions.. you need to keep the item wet for a while with the solution for really ugly, bad set in odors. It's a concentrate and makes a lot.