The previous owner of my new MINI was a smoker and he must have left the windows up... I've been working on getting the smell out and have had some success, but there's still some residue in the ventilation system. The spray I've been using works great, but I haven't been able to find the recycle-vent opening for the HVAC system to squirt some inside. Any clues?



(I've already replaced the cabin filter, but I'd like to spray some odor remover into the HVAC pipes without removing the whole system.)
Thanks,
OldCoot