Just finished doing deep cleaning my desktop computer... don't know how it gets so grubby... I go down and remove the heat exchange unit, clean, and reinstall with new heat sink compound. The computer has always been on a shelf on the wall about 5 feet off the ground. And I clean it every six months. But it sure gets dirty (it's not near any heating vents etc etc.)
With that said... I have purchased my first notebook computer... it's not going out in the "field," but considering how dirty the real desktop gets... I'm wondering if anybody has done any internal cleaning of their notebooks?