Using the Nella Roll - Top Chafer is easy. First, place the chafer on a flat and stable surface. Then, put your prepared food in the 9.5 - quart tray. Insert the fuel into the two fuel holders (fuel is not supplied, so you need to get it separately). Light the fuel, and the dual burners will start to heat the food evenly. When guests want to access the food, they can simply use the roll - top design to open it easily. As for maintenance, after each use, wait for the chafer to cool down completely. Then, use a mild detergent and a soft cloth to clean the stainless - steel surface. Avoid using abrasive cleaners as they may scratch the surface. Store the chafer in a dry place to prevent rusting. Remember, the price is only valid online.