Tamar si pareng kenji, it is advisable to use those coolers to help lower down your lappy's temperature. Just like what I said make sure that the fan aligns with your laptop's "holes" and that the direction of the air of the cooler and that of your laptop, of any, is in the same direction. I remember I had to "reverse" the fan in my cooler for it to "coincide" with my lappy's internal fan direction.
To minimize the dust that has accumulated inside, I blow air through the various holes on the laptop. I however immobilize my laptop's fan inside before doing this by sticking a paper clip in it for it not to move. I am afraid the high pressure of the air being blown inside might spin the fan too fast and might damage it.
