Damn who knew this thing is self cleaning? some guy figured out the PS3 Fan test which blows out the dust and your systems runs better?
I don't know if its true but I will be trying it, here's the You Tube tutorial
on PS3 Fanboy.
edit: Only for 40gig however.
http://www.ps3fanboy.com/2008/04/12/...k-n-easy-test/