Using the Nella Countertop Chip and Fry Warmer is a piece of cake. First, plug it into a 110 - volt outlet with a 60 - Hz power supply. Then, set the temperature according to your needs, anywhere between 45°C (113°F) and 75°C (167°F). Put your chips or fries in the removable food pan and place it in the warmer. When you're done serving, wait for the warmer to cool down before handling. To clean, simply remove the food pan, dump out the crumbs and residue, and wash it with mild soap and water. Keep the outside of the warmer clean with a damp cloth. Avoid using abrasive cleaners as they can damage the stainless - steel surface. Regularly check the power cord for any signs of wear and tear. If you notice any issues, stop using the warmer and contact customer service.