How ozone actually works
An ozone generator converts oxygen (O2) into ozone (O3). That third atom is unstable and readily bonds to the organic molecules causing the odor, chemically altering them into compounds that do not smell. Because ozone is a gas, it reaches everywhere air reaches โ inside vents, under seats, into headliner foam, behind trim panels.
That reach is the whole point. Sprays and foggers treat surfaces. Ozone treats the volume of the cabin, which is where smoke and mildew odor actually live.