As I was opening up my macbook to install a new upgrade of RAM i noticed that there was a considerable buildup of dust on the internal fan. I thought that this could not be good for the macbook but I didn't touch it because I didn't want to mess anything up. Has anyone cleaned out the unibody macbook fan and is it even necessary to clean the fan? I just don't want my macbook to have problems because there is dust buildup in the inside of it. Any experiences/methods when cleaning internal fans in laptops would be appreciated.