today i finally decided to clean my white macbook on the inside for the first time ever. it is a rev.a machine, which basically means it is almost 3 years old. but since apple replaced the logicboard (when the random-shutdown issue was around, before they knew the cause) i'd say it had time for about 2.5 years to get dusty i did it because i was annoyed how when the machine got hot the fan kicked in (like it's supposed to) but the temperatures dropped like only super-slowly, which meant that the fan was constantly spinning at high-speed => annoying. i've been planning on cleaning it for about 4 months now, but i: pick one: was too lazy, had no time, liked the warm macbook in the cold winter anyway: taking the macbook apart was super easy, even with a flathead screw-driver . the ifixit guide helped a lot to get in quickly. only the right side of the keyboard took some fiddling to get off. approx. times: disassembly: 25mins (keyboard fiddling) cleaning: 35mins re-assembly: 10mins some dusty impressions: this is the underside of the keyboard. one can clearly see where the fan was and where the hot and dusty parts are. this came off easily with a micro-fibre cloth. a "little" dust here . that thing under the fan definitely shouldn't be there. one should only see nice copper fins there. and clean enough: after some time cleaning it with cotton-swabs, toothpicks (yes ), and a lot of air i consider it to be reasonably clean. btw: does anybody else have a "better" sticker on the ram slot? does this indicate the logic-board replacement? now when the fan kicks in it actually lowers the temperature and also spins down again.