Nicotine

Machine dropped off for bench work

C: The computer no longer powers up.

It reeked of cigarette smoke. As I was unscrewing the door on the case

Me: Did you know that cigarette smoke can damage electronics?

C: insisted that she never smoked around it (because she had quit smoking, you see).

The door came off and the entire inside of the case was dripping in dark brown sludge, which is what happens when smoke and dust spend a lot of quality time together.

C: (finally admitted) Ok maybe I smoke “one or two” cigarettes a day around it.