"Mini Air Cooling Fan" transport the most important parts is bearing a long time the lack of oil, will generate noise such high-speed rotation. Therefore, we only need a few drops on the fan bearing lubricant, sewing machine if you do not use can be replaced. But be careful do not use oil instead, because of its relatively large particles, easy to damage the bearings. Vibration noise is also a "Mini Air Cooling Fan" an important part of the noise because loose leaf on bearings and bearing wear resulting in the gap becomes larger and so on, so only need to remove the sub-sector, the screws tight button, so firmly fixed after, "Mini Air Cooling Fan" will not shake.