Hi WIlma, here's a great tutorial that will show you how to clean your oven door - https://www.merrymaids.com/cleaning-tips/quick-tips/how-to-clean-a-glass-oven-door/
Have you tried Softscrub,
I wrote a post about it that might help - https://chascrazycreations.com/how-to-clean-your-oven-window/
Hello, these Hometalk link How to Clean Your Oven Door could be very informative.
Additionally -I clean my interior facing glass greasy build up very similar to how I clean my glass cooktop surface. I use the safety razor-to scrape way the heavy spattered grease and then use cream glass polish.
Here is one way: https://www.hometalk.com/6593859/how-to-clean-your-oven-door-naturally-cleanit