Fabreeze is just a cover scent. I would steam the seats then spray the interior fabric with an odor terminator that kills the bacteria which cause the smell. Lysol has a pretty good one. Finally I would take it to a detail shop where the have a ozone machine which ionizes the air to get the smell out. That takes about 6hrs and it's not to expensive. We charge 59.95 where I work for the service.
