paint it as suggested. Smoke is hard to get rid of if the person really smoked a lot. I moved into an apartment where the previous person smoked. Even though it was re-painted and had new floors I could still smell it. Turned out to be two places, the air ducts, which I had to vacuum out and cover with charcoal filters on the registers , and the ceiling fan had not been cleaned good so every time it was used it spread that smell.