Well, the carpet isn't really THAT bad but I'm trying to get the smoke smell out of my truck ... I recently quit smoking and it smells like an ashtray. I don't have that problem with my car because I didn't smoke in it.
I was using my parents little green clean machine but it's kinda half-assed. I used to detail cars, years ago, and got used to the industrial machines ... Don't know much about 'homeowner' stuff...