Re: Cigarette smoke.
Back in the day (early to mid 90's), i replaced a fair few floppy disk (later, CD-ROM) drives that had died an early death due to cigarettes.
Floor-sat tower computers, with fans sucking in carpet fibers and mixing them with nicotine smoke, made for a short life span for anything with moving parts. The rest of the computer usually survived a bit longer, but not much.
I was quite pleased when smoking in the office was outlawed!