How can i clean the inside of the PS3?

I found a PS3 at a yard sale for 50 buck!!! yeah but i figured it'd be too good to be true anyways i was haggling they guy and he said it doesn't work it has the YLOD and he even showed me so he gave it to me for 30. So when i was opening it up it was the most horrifying thing ever...roaches! a bunch they weren't alive or anything but still disgusting i know i can make it work again i just need to know how to clean it can i use any liquids or what?