I'd say the same of PS3 if what Phil says is true! If they designed a system that can suck in and deposit dust on sensitive areas with no outward sign of problems, then Sony were building a system effectively designed to break. If so, the manual should read something like, "it's important to vaccuum the vents every 4 months to remove internal dust, even if the outside looks clean." If they're not providing the correct maintenance advice how can the consumer to be at fault?