No clue what category this belongs it.....

Reaching out to moms who are good at removing stinky odors....

DS has a packit lunch bag (not machine washable) that unfortunately had a milk cup spill/leak inside it last week. It smells awful. I first washed the outside under the sink that afternoon when we got home.

Still stinky....washed in a bucket with dawn....then clean water then dried overnight. Still stinky.

Any ideas on how to get the sour milk stink out without ruining the lunchbox?