[azasadny]

I've been in IT full-time since 1991 and I have yet to see any damage caused by cleaning the PC's interior. I prefer compressed air to vacuuming, but whatever you do, clean that PC once in awhile! I worked on one a few months ago that was ruined from cigarette smoke and dust. The combination created a sticky brown tar-like substance that covered every interior component and ruined the PC. Every part was replaced, except the case, which I cleaned with Krud Kutter and reused. I may have a picture of it somewhere, it was the most disgusting thing I have ever seen!