What happens next?

How to deodorize a car
Look for sources of odor.
If you notice an unpleasant smell in your car, search your car for a potential cause. Search the floor of your car for anything that could cause odor, like clothing, spills, or food.
Be sure to search under seats, in between seats, any compartments or cup holders, and in the trunk. Toss out any obvious causes of a bad smell.