A bit more time spent removing evidence of smokers...not sure it's helped any, but can't be making things any worse... Removed the long piece of trim along the dash above the infotainment screen, removed Columbus screen, removed front side, and dashboard air vents, rear air vent, cleaned front window door rubbers more thoroughly and got into the gape between the door card and internal window seal... The only parts I've not been able to remove were the big centre air vent, and the air vent/speaker cover on top of the dash; any suggestions on how to remove those greatfully received! I had a go, and things felt a bit 'snappy'! The amount of ash, dirty dust and the odd piece of unburnt tobacco that was hidden away was surprising, and really shows it gets in everywhere... That rag was clean before I started. To be fair, the really grubby mark was from the outer window door rubber, but the rest is from the interior window rubbers and air vents! The top of the screen, which you can't get to without it being removed was grim; this photo was taken after I cleaned it. I've been down a rabbit hole this weekend, investigating best cleaning practices, and there have been a few suggestions that cleaning the interior when it's hot is best as the smells are apparent and the material pores are open. With a little luck, the second Airvidox kit is arriving tomorrow, so I'll let the car get hot during the day, and clean the panels and seats tomorrow evening before dropping the bomb. The nuclear option after all this is an ozone generator... Let's see what happens over the next few days. Cheers, Nick