Vinegar and baking soda! Make a paste, put on oven, wipe off after @45 minutes!
Many stoves have oven doors that come off to make it easier to reach the back of the oven.
Just open slightly then pull up off the hinges. Its heavy so be prepared for the weight. Then you can clean the door on the countertop. Just reverse to put it back on.
Hi Lainie! I assume you are speaking of the traditional old electric oven without self-cleaning components. I have cleaned many ovens over my lifetime! Just be sure that you really clean off the cleaner that you are using, you may have to wipe it down several times to get all the cleaner off. Here are some good cleaners for you!