Today I decided to open up my PC's case and de-dust it. I usually do it once every 4-5 months but I've been putting it off and before today I hadn't done it for over a year... :uhh: It took me about 20 minutes to clean all the dust out, starting with the main fan, the dust case around the fan, and then all the dust stuck in the corners of the chassis and around the cards. I recommend using compressed air to loosen the dust but I didn't have any so I had to pick with my fingers. I started with a wash cloth but had to go in with my hands to get every floating chunk of dust. :yuck: You'd be surprised how much dust is getting circulated into your room if the inside of your PC (especially ON the fan) is dusty!