Products specifically designed to neutralize or encapsulate odor molecules can be effective for stubborn smells.

Clean the car interior first to remove the source (Step 1 & 2 above).
Odor Eliminator Spray: Purchase an automotive odor eliminator spray (like Febreze Auto, Ozium). Lightly spray onto fabrics, carpets, and into the air vents according to product instructions. Avoid oversaturating.
Odor Bomb/Fogger: For severe, widespread odors (like heavy smoke), use an odor bomb or fogger. These release a fine mist that circulates through the entire cabin and ventilation system. Follow product instructions carefully, which usually involve closing all windows/doors, placing the can inside, activating it, leaving the vehicle sealed for a specified time, and then ventilating thoroughly afterward.

N/A - Offers stronger chemical solutions for tackling persistent or deeply ingrained odors.

Use Commercial Odor Eliminator Sprays or Bombs