How can I eliminate the terrible odor in my car?

My friend forgot a gallon of milk and I did not find it for 2 days. The milk had spoiled and the jug exploded while still inside the plastic store bag, but it did NOT drip out of the bag and there was no spillage, but the smell is horrendous. I cannot leave the windows open as it has been raining and is expected to continue to do so. What can I use to get the smell out?????