No smoke
Hi there.
Yes try vinegar. Put a huge pot of vinegar on the stove and warm it up, while the whole family cleans the house.
My friend had this problem and here is what she did.
Remove all curtains, and curtain rods.
Any platic. Check the fridge door lining.
Washed door frames with bleach.
Replaced all inside doors, as they will suck up any odor.
Replaced all basebords.
Cig smoke and the nigo is very hard to get rid of.
If you paint, be sure to just paint a small wall and then wait 1-2 months to see if the nigo comes through. If is does, then back to washing the walls again.
Good luck.
Silving