When you’re using your oven to bake dinner for a crowd, one of the worst things you can do to affect the food and your utility bill is open the oven door unnecessarily. Ovens use a lot of energy to get hot, and every time you open the door, the temperature drops by about 25 degrees. When you close it, the oven uses more energy to get back up to the programmed temperature. This also can affect the final outcome of dishes -- especially baked treats. Use the oven light instead of opening the door to check on whatever you’re cooking.
ANDREWS MCMEEL SYNDICATION