If you have a car that someone has smoked in and you want to get rid of the lingering smell of smoke here's what you do. Get a small towel and cut out strips that are about 2" x 6" then soak the towel strips in white vinegar. Once they are good and soaked, put the towels into all of the ashtrays in the car and leave them there overnight. Next morning you can remove the towels and the smoke smell will be gone. It'll smell like vinegar of course, but that'll go away after a day or so and the smoke smell will be gone too.