I've made the same attempt you have but it always seems to fail. Although 2 weeks ago when i got my windows tinted, i tried not smoking in it again. It worked so far. I've also been meaning to take out my seats and do a huge clean on it, except i don't have carpet, i have the plastic stuff. My seats are also not cloth so i couldnt help you there either. So basically my post doesnt really have any meaning except for wasting your time. Sorry.