My partner used to be a heavy smoker, he turned to vaping to save money and stop the smell which I was grateful for. The problem is that he vapes in the living room at night when the kids are in bed, when I come down in the morning it stinks, there's an awful stale smell I can't stand it. He can't smell it so thinks im just making it up, but im conscious that it will be noticeable to guests too. Any ideas in how to get rid of the smell?