My sisters car was the worst smelling car in the world the guy before her must have smoked in it without ever rolling the windows down, the windows and trim had a yellow haze from it. Used every technique of wiping it down to shampooing removing parts of the interior for cleaning nothing ever worked or worked for a short period of time. I gave Meguiars Mirror Glaze #23 Odor Eliminator a shot and it worked, no smell ever returned. The stuff is amazing