Appliances Ovens / Stoves: Use pots that properly match the stovetop’s elements in size. Preheat only for a minimum of time. It is only really necessary for baking. Use the self-cleaning feature on an oven immediately after cooking so it will use less electricity. More Use the oven window to check foods as they cook. Opening the door releases at least 20% of the heat. Instead of using your oven to reheat food, use a toaster or microwave oven to save energy. Consider a better insulated, self-cleaning oven, which can be up to 25% more efficient. Avoid using bent or deformed pots and pans because they use more energy to get to the desired temperature. When cooking, use lids that fit snugly and keep them on while you cook to achieve an energy savings of up 20%. Save electricity by boiling water with an electric kettle. Only boil what you need. Check the kitchen range filter and change when they get dirty. A dirty filter will slow down airflow and make appliances work harder.