With consumer detailing, there is a huge market for eliminating severe odors on the interior of a vehicle. This includes mold problems from the air conditioning system, water leaks that cause mold in and under carpets, cigarette/cigar smoke odors, spills, pet stains and others.
Odors cannot always be removed by shampooing; a more professional approach to odor removal is sometimes needed. There are a number of methods that can be used, including biological odor eliminators, fogger systems and ozone generators.
Auto dealers have always been a great market for deodorizing, but, as always, they do not want to pay as much as a retail customer will pay. If you can convince them of your ability to rid a used car of odors, then you can command a fair price.
The costs can range from $20 to $25 for a gallon of chemical to $700 for a commercial grade ozone generator.
Whatever system you use, be sure it works and promote it to your retail customers, auto dealers and the public.