My ps3 games either freezes or keeps loading?

my ps3 hasnt been working for a while now and ive done every trick in the book to get it to stop freezing midway....it freezes like after 20 min. of play. my codwaw always online loads then keeps loading and nvr loads at all. ivr tried hold the eject and start it tob blow out the dust ive tried fans, open space, elevating it....and other techniques i could try or do i gotta send it to sony?|||i got mine as soon as it came out and no probs = figure it out not ev prob you have come to yahaskin 4 a new 1 oo answer just kiddin try