Remove all trash, ash, cigarette butts, and personal items from the car
Vacuum seats, carpets, floor mats, trunk, and crevices thoroughly
Clean hard surfaces with an interior cleaner or mild soap and water
Wipe down headliner carefully with a fabric-safe cleaner
Shampoo fabric seats, carpets, and floor mats
Clean leather seats with a leather-safe cleaner and conditioner
Replace the cabin air filter
Clean or replace the engine air filter if needed
Open all doors and windows and air out the car
Use activated charcoal, baking soda, or odor absorbers inside the car
Run the HVAC system on fresh air with the fan on high
Clean air vents with a vent brush and disinfectant-safe cleaner
Use an ozone treatment only if recommended and done safely
Have the car professionally detailed if the smell persists
Replace heavily smoke-damaged upholstery or carpeting if necessary