Using this hand dryer is easy. Just place your hands under it, and the infrared sensor will detect them and turn the dryer on. It'll dry your hands in 15 seconds, then turn off automatically. When using, make sure the power supply is within 110 - 120 volts. Don't block the sensing zone to ensure proper operation. For maintenance, keep the dryer clean. You can use a soft cloth to wipe the surface. Also, check the thermal protection feature regularly to make sure it works well. If the dryer overheats, it will reset itself, but if the problem persists, contact a professional.