The walls are one thing else a lot of people do not take into account with regards to clearing up smells. Each time you or a person else smokes in your house, that clings to the walls, and in most cases, you don’t see it. On the other hand, overtime the walls will begin to change color and it is going to be noticeable, especially on pale or white walls. Maintain the smoke out of the air with an Airfree P1000 Air Purifier. Soon after you clean them up though, they are going to not only look much cleaner, they’ll look brighter also.