I am sure by now you have scrubbed and cleaned the best you can. With everything you can think of, but use the cheapest shaving cream you can find. Yeap, you heard me correctly - shaving cream. Scrub it into the carpet really good with a clean cloth. DO NOT wet the carpet first.
Just put the shaving cream on the carpet, and start scrubbing. Then after a few minutes of scrubbing, walk away for a little while. Let it dry for a little while. Vacuum, then sprinkle the area with baking soda. Let that sit for a while, and then vacuum that up. The longer the baking soda sits, the better. It really soaks up all that odor really well, as does the shaving cream. Shaving cream is great on so many stains on carpet in your home also. I did this when my grandson threw up in our truck, and it worked really well.
I can help you with your little problem. But you have to listen and do exactly what I tell you to....
I had milk spill in my car last year. the local grocer, (kroger) carries a line of steam carpet cleaners ( Rug Doctor). I used Rug Doctor’s “odor remover” carpet cleaner on the spill.
soak the area with the cleaner, and cover the area with a dry rag. it helps to hold down the rag, with a heavy weight to help absorb the cleaner and milk. Leave it for several days and then use wet rag to remove the remaing cleaner. repeat the process. it took a couple weeks but it
improved gradually and finally was gone. I spilled about 6 - 8 ounces so hopefully you did not spill much more than that.
I would take the car to any professional carpet cleaning service. They can clean the carpet and inject it with enzymes that’ll eat the sour milk and bacteria.
Those guys are pretty amazing. My uncle had to hire a team to clean up a rental apartment after a tenant shot himself. I had to use them after my (then) four year old son learned how to ‘aim’ and decided to pee on *everything* in his room. (I didn’t figure it out for a couple of weeks, so the smell had time to turn to pure ammonia and he had time to do a LOT of damage.)
In both cases, good as new! :-)
And it wasn’t as pricy as one would think.
After the carpet is cleaned, have the whole carpet professionally cleaned. (It should be around $200) That’ll get the lingering odors out of the seats and headliner.
2. Leave the wet sneakers in the car for several days.
I guarantee this will cover up the smell of spilt milk.
Check with Click and Clack on their Car Talk Web Site
When I was a youngster my Mom broke a bottle of milk in the rear foot well of her car. Of course it was summer and boy did it stink. After cleaning as best as my Dad could it still smelled. What he finally did was to place a cut up apple in the foot well. Once they turned brown we replaced them. After a few apples we were good to go.
Use Kids and Pets to clean the area (available at WalMart). It will remove any stains and associated smells.
I had to deal with this a few years ago in a new car. One of my kids dropped her sippy cup and it dripped for hours before it was discovered. It went into the carpet and under the plastic cover at the bottom of the door frame. I had to take that apart, wet vac, use carpet cleaner, etc. Got most of it, but time had to take care of the rest.
Now I’m dealing with it again. Another new car, another spill. Wife spilled coffee (w/ cream and sugar) down into the center console. Didn’t even tell me about it. Only fessed up after I noticed the fermenting smell. Had to take apart the console, found remnants in the bottom of the cup holder and on the transmission tunnel. Again, I got most of it but time will have to take care of the rest.
So much for that new car smell.
get a carpet cleaning machine, use a solution of water and vinegar, in a 3-1 ratio. Has worked for me on many different carpet smells.