Contrary to popular myth, household dust is not primarily composed of human skin. In fact, although there are some skin cells present in virtually all house dust, its composition varies quite dramatically from area to area, season to season and room to room. 
Thankfully, with a little DIY work on a typical desktop PC case, you can increase the reliability of the fans, which in turn ensures proper cooling of all your system’s important components: processor, video card, memory and power supply.
Check out the article including tips and solutions via Tec Radar [Link]
