Oven cleaning hacks.
This explains how to clean your stove while you sleep. I have used this MANY times and it really work well and is very inexpensive.
Here are several ways to clean it, shown on Hometalk: https://www.hometalk.com/search/posts?filter=how%20to%20clean%20an%20electric%20oven
Here are some helpful links that I hope will help —you choose the best solution for your need.