Using the Nella Single Chamber Food Warmer is a breeze. First, plug it into a 120V, 60Hz, 1 - phase power source with the included NEMA 5 - 15P plug. Then, place your 2 half - size pans or 1 full - size pan filled with cooked food inside the chamber. Adjust the thermostat according to the type of food you're warming, ranging from 30 to 90 degrees Celsius. Make sure not to overload the warmer to maintain an even temperature. When it comes to maintenance, clean the interior and exterior regularly with a soft cloth and mild detergent. Avoid using abrasive cleaners as they can damage the stainless - steel surface. Also, check the power cord periodically for any signs of wear or damage. If you notice any issues, stop using the warmer and contact customer service.