... is spark in use, smoke and smell of the case, immediately turn the power off and unplug the USB ... plug. Do not disassemble the fan. 3. Do not use water or cleaning water to ... 4. Do not use liquid or metal lubricant into the fan inside. 5. Do not place or the vibrations in ... direct sunlight, hot smoke, the room temperature use. 6. Fan to remove the power cord, hold pull the plug, not ...