Before cleaning, maintenance, or moving the device, turn it off and unplug the power cord. Do not pull, twist, or bend the power cord. If the power cord is damaged, or if the device shows abnormal smell, smoke, malfunction, or failure to operate normally, stop using it immediately and disconnect the power. Do not disassemble or repair it yourself. Children must not use this product as a toy, and inexperienced users should use it only under proper supervision.