1. Clean the heat sink and when we first "Mini Air Cooling Fan" apart, with the brush to remove most of the dust on the fan and heat sink (heat sink can be rinsed with water directly). For a Bo of oily stains on the fan and heat sink, you can use a cotton swab dipped in alcohol to wipe clean or wash fine.
2. Remove the "Mini Air Cooling Fan" from the heat sink, turn on the bottom surface of the oil seal, we can see that the axis of the fan, if the fan for a long time in a dusty place but did not do the cleaning work, the fan bearings (mostly oil nylon bearing) will be solidified on the hard, black. Then should first "Mini Air Cooling Fan" bearing oil removed, you can wipe them with a cotton swab or paper can also be used wooden toothpick slowly removed, but not forced, to BU chapter bearing the heat sink and fan apart, Then in order to avoid damage to the coil.