1. To clean first "220V AC Cooling Fan" heat sink and 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 "220V AC 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. At this point you should first remove the oil bearing fan, 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 so as not to damage the coil.
3, and then began "220V AC Cooling Fan" add oil up. We can use a sewing machine oil or automotive engine oil, do not use household seasoning oil, cooking oil, etc., because cooking oil will be solidified or deterioration. Dipped in the lubricant with a straw or tweezers and drop of lubricant in the axis can be, not too much.