I wish I'd remembered about this thread when trying to clean my ant infested hardware. Piles and piles of dead ants falling out of my PSU was a pretty disgusting sight. I don't know what it is about ants here (they are only little ones), but they enjoy eating wiring.
I have lost more stuff to ants than any other factor. So far I've lost 2x PSU, 1x HDD, 2x extension cords and a router all to ant eating the internals/wiring.
The extension cables were pretty scary actually as they'd exposed bare copper wire to the outside! The hard drive was just weird. one day there was a neat little pile of silicon dist on the top of the HDD next to a hole with ants entering and leaving my drive.