There are alot of videos on youtube about how to do it, but what does it actually do? All I know is that it makes your computer run cooler, but it must do something thing else right? I am thinking of doing it myself, I think I can open up my computer without voiding the warranty, could apple tell if I did it myself? And in the videos they all use alcohol to remove it! Isn't that bad for the motherboard and such? Thanks for replying!