How do you remove sour milk smell from carpet?

easy using matthews 5th degree cyclops we know that sixty nine eggs broken over it works very well

Mop it with white vinegar

I would wash it down throughly with hot water and baking soda. Be very liberal with the application of both. Milk had gotten down into the cracks and crevices and you'll need to work to get it out.

You can either remove your carpet and add a new one, or wash the carpet

Reclean with fresh water. Dry and then try 48 hours service of commecial ozone generator.