Using this nail dryer is super easy. First, turn it on and set your preferred temperature, either hot or cold, depending on your needs. Then, place your hands or feet inside the dryer. Thanks to the sensors, it will start working automatically without you having to touch anything. When you're done, simply remove your hands or feet and turn off the dryer. As for maintenance, keep it clean by wiping it with a soft, dry cloth regularly. Avoid getting it wet to prevent damage. Also, make sure to use it within the 1 - year warranty period and follow all the safety instructions provided.