I have never (fingers crossed) had a problem with my PS2 and its the old fat model. It used to be set up on our kitchen table and as a result had all sorts spilled on it, tea, coffee, food etc and it keeps on working. It is now in my room and gets dusted every other day so it doesn't get too dusty, and it keeps on working (at least it better, I just got Silent hill 3 the other week and I still need to get around to playing it)