I recently helped my Uncle out who got a car from his Mom who smoked, I went out and got him a dozen apples and cut them up and put them on paper plates all over the inside of the car( floor, seats, dashboard, back dashboard) then we closed the car up, yes the windows have to be closed, and then let it sit for 24 hours, the premise behind this is that somehow the apples cut up absorb the smell of the cigars and leave a smell of apples which will go away, I know it sounds strange but it did work, you may have to do it a 2nd time, I hope this helps.