I got one of these a while back. Does a decent enough job for the price...
I've heard these are good
or just use a hoover, turns out its quite hard to kill PC parts with static
Cleaning the interior of a computer. In the past I've used canned air but that seems a bit silly. I've also experienced fluid being created from it which freaked me out.
I've seen usb electric fans recommended to me in adverts this week. Anyone use one? Any good? Any brands to look for?