So important "220V Cooling Fan" The accumulation of dust, bound to affect the performance and heat dissipation. This therefore requires us to regularly clean the power supply fan. When we have the power to clean up the computer, you need to first clean up the power of external, carefully twist off the screw, first with a toothbrush Clear "220V Cooling Fan" blade dust, note that the dust will kick up high, be sure to take your time. Cleared the way to other places inside the dust is also cleaning. Remove the paraffin, oil and even the fan cover also brought out, if the inside of the bearing oil bag is very dry, when run on the inside will certainly be more than a little friction and noise. So let's job is to "220V Cooling Fan" add oil.