Originally Posted by Flewis 
I think you should stop dust getting into the case in the first place. Dust can potentially damage other components not just the psu. Ur psu may be dust free but it wont make any difference to a fried motherboard.
Have a look at an Antec 900 mate and you'll see the problem....
Clunk... how do you attach said 'Bounce' sheets, and seriously, how often do you have to clean your PSU?