Once the milk has been shampooed out of the carpet and upholstery there should not be
any smell at all, put one of those Febreeze attachments on it if you think you still smell it.
Use CARPET SHAMPOOER AttachMENT aND THEN LEAVE A FEW apples INSIDE CAR OVERNIGHT BROKEN INTO PIECES! fOR SOME REASON apples TEND TO REMOVE ODORS VERY WELL. good luck!!
Milk is bad news. If it's in the carpets, maybe consider replacing them. If it's in the seats, I'm really not sure.
go with shampoo, then a mix of baking soda and water. also, I like the apple suggestion.
Cleaning is not the problem, just the sour odor,
