Life is short, play dirty. It's a motto we'd love to see Nike implement in a new sports shoe, maybe one with a steel tipped shank on the front or soles made of flubber. In a more literal sense, playing dirty describes how we use (and sometimes neglect) our PCs. Are you rocking any fan filters? You should be, whether it's one of Lian Li's new removable and washable filters, or ones you've constructed on your own à la MacGuyver.