Some different odor elimination products are designed to clean a car’s air conditioner system. Foaming cleaners are designed to deep clean the AC evaporator and often require the removal of the blower motor to gain access. Sprayable cleaners can be applied directly to the vents to clean the air ducts. The third type of product designed to eliminate AC odors is a fogger intended to be used while the AC is set to the coldest temperature on recirculate.
No matter which method of AC odor elimination is utilized, the cabin air filter should be changed. All the cleaning in the world won’t make the AC smell better if it’s pushing clean air through a dirty cabin air filter. Some cabin air filters are constructed using charcoal which helps to keep the car odor-free better than some less expensive filters.