I'm not a smoker and I always try to not let anyone smoke in my car. But when it's late night/early in the morning and I have to drop someone off or I want to leave before someone yaks in the car I've been wondering what's the best window arrangement for letting people smoke in your car? If anyone has a little air flow chart for what windows should be down it would be great. I have a sunroof as well if that's affecting. The way I usually roll is if the smoker is in the passenger seat I roll the passenger window a quarter/half down and the rear a quarter down.