Just got finished cleaning mine. Man it was full of dust I had to pull all the wires cables and drives just to get it all, there were clumps everywhere. My heatsink fan was looking like one giant dust ball I had to vaccum it of and then use a knife to slide in between the metal ribs or whatever you call them! I just used a vaccum for the job I am way to worried to use a air compressor because of moisture! I also found out why my floppy drive was not working, my son must have stuck a penny or something in there! I guess thats what happens when you are in the middle of remodling your house! anyone else check inside there case lately?