Ever opened your car door and been greeted by the lingering, unpleasant aroma of stale cigarette smoke? It’s a common problem, and whether you’re a non-smoker who recently purchased a used car, or a former smoker trying to increase your car’s resale value, that persistent odor can be a real headache. Smoke molecules cling to every surface, embedding themselves in the upholstery, headliner, and even the ventilation system, making them incredibly difficult to eradicate with simple air fresheners alone.