The 13" Macbook is so white that even a small stain on it makes it look so dirty. This would help you to clean your macbook with out affecting the electronic parts. Step 1: Switch off the power and remove the battery from the back side of the macbook. Step 2:Confirm what kind of stain does your macbook carry. Step 3: If it is a stain made by using dirty hands. then you can use your eraser that you use for stationary to clean those stains. Step 4: If still they are present then try some cream ...