suddently, and for no aparent reason, my average computer temperature has increased. I checked and all my fans (5, at the total) are working fine and at the normal speed, there are no cables obstructing the airflows, and all the dust is clean. it increased (this is the temperature while doing nothing) from 54ÂşC (CPU) / 24ÂşC (mobo) to 57ÂşC (CPU) / 26ÂşC (mobo). And what its most preocupant, is that it goes to 60ÂşC very easily 
so, any ideas of what might have happened?
so, any ideas of what might have happened?