I have a big problem with dust/dirt build-up inside my case. It can get so bad at times that the heatsink will be all clogged up, and there are little dust drifts built up around parts. I clean it out as often as I can with canned air duster, but it's a pain. Are there are kind of fan filters you can get, or make? I've heard old stockings work, but wouldn't that decrease air intake? I'm not running a lot of big fans or anything really, so maybe a better set up as far as intake/exhaust could help. Any ideas??