Keep the lid closed when appliance is not in use. Maintain proper water level at all times. Immediately fill the appliance with water to 3” (76mm) deep. Avoid allowing water to reach a "very low water" level. A "very low water" level would be any water level 3/4" (20 mm) or less water depth as measured from the tank bottom. Never operate appliance without water! These precautions will prevent the appliance from over-heating and prevent potential damage to the heating element.