You can try renting an Ozone Generator. Hotels use them to rid rooms of smoking odors and other ill smells. Auto detailers use them to get rid of interior odors. Heed the instructions that come with the unit. It will kill the mold and fungus or bacteria that cause odors but, be aware you can't breathe it without dying also. I've used it in a Blazer I have. Took two treatments of about 2 to 3 hours each. After you air the car out, it will have a funny smell for a couple of days. However, it goes away.