After a whole year toying my Macbook, finally I decided to take some free time out and check out my one year old Macbook.
There are actually many guide online, I got this guide from Powerbook Medic an online Apple accessories store, well, I just ordered a Macbook upper case 
Although my Macbook only 12 months old, but the dust inside are disgusting, I sweep it all away, clean the holes and hoping it run cooler, but no 