Yep I would vaccum it as much as possible to try and get dust and stuff out, and then actually hit it with compressed air (vaccum first), don't set it on your lap as this only keep heat trapped against your legs (set it on some sort of tray if you feel the need to use it on your lap). and as Suction mentioned a cooling pad will definately help some as well. If its out of warranty, and you feel the urge you can open it up and actually clean it out, but i wouldn't do so unless your warranty is already up.