Like all appliances, the oven has a tendency to get dirty inside. Unfortunately, unlike most appliances, the oven is extremely difficult to clean out. Many ovens have a clean selection that will burn off all the excess items in there, but even those left over ashes can sometimes be difficult to wipe away. If your oven does not have the clean function, the method most people use is to clean it out with an oven cleaner. It will most likely consist of spraying the cleaner on all dirty parts of the oven, and then letting it sit overnight. If you want to make oven cleaning a real breeze, just try this how to handy trick.