I didn't replace my microfilter, but when i FINALLY get my car back i plan to, that will be the last step. Basically what was used was a LOT of different cleaning agents on the vinyl, some armor all basically everywhere. I shampoo'ed the carpets, and cleaned the leather with leather cleaner about 5 times. You honestly at this point wouldn't be able to tell that both I and the previous owner of this car used to smoke in it.
(graham congrats on the cohiba quitting, i've cut my smoking habit from a pack and a half a day to just the occasional social cigarette, except around car guys for some reason
but i still smoke 2-3 cohiba or montecristo's a week when the money's good, or romeo y julietta's when im poor