Remove all trash, ash, and cigarette butts
Take out floor mats and wash them
Vacuum seats, carpets, and crevices thoroughly
Wipe down hard surfaces with an interior cleaner
Clean windows and mirrors inside
Wash or replace cabin air filter
Sprinkle baking soda on upholstery and carpets, then vacuum it up
Use activated charcoal bags in the car
Use an odor eliminator designed for smoke
Shampoo fabric seats and carpets
Steam clean upholstery and carpets
Clean the headliner gently
Run the air system on fresh air mode
Replace or clean the cabin air vents
Leave windows open and air out the car
Park in sunlight with doors open when possible
Repeat cleaning as needed until the smell is gone