To neutralize tobacco smoke, buy an aerosol can of Dakota Non-Smoke. Holding the can 12 to 14 in. away from fabrics, lightly spray the headliner (don’t soak it), seats, door panels and carpet. Then turn the fan to high and switch the system to recirculate mode (“max. A/C” if you don’t have that option). Find the intake opening by holding a tissue near the blower motor. Then spray the mist into the opening. Leave the windows closed for at least one hour. Your vehicle will smell like baby powder for a while, but that’ll go away.