Computers like that are the reason I have painter's masks, latex gloves, and a leaf blower. I've seen a few systems that had me amazed that they were still running.
Imagine what his lungs look like! ;-)
I have many customers who smoke around computers. However, there is this one customer in particular whose house completely reeks of smoke. So much in fact that I have to take a shower and change my clothes when I get back home because I can actually smell it on me.
Her PC, after I cleaned it out several months ago, was easily one of the worst as far as dirt and smoke smell inside of it. Yuck!