Third hand smoke?

http://www.sciencedaily.com/releases/2010/02/100208154651.htm

Wow yes third hand smoke really like first and second hand weren't enough now there is third hand.Well obviously this was new to me i can't give all the details away because you're gonna want to read the article but apparently when a cigarette is smoked the nicotine can be absorbed into walls and curtains. This is useful because when a person who is smoking leaves the room the smoke clears and the smell is gone you think that its ok after reading this you might think other wise.