[NostalgiaRadioTime]

This is going to sound really dumb, but I've had radios that reeked of smoke and, out of desperation, resorted to Lysol lemon scented room deodorizer, spraying a mist inside the cabinet once the chassis was removed. It wasn't a cure all by no means, but it at least masked the smell for a while. And lemons smell better than ciggy smoke!