Kathy...I understand on many oven doors inside near the glass there is a slit that you can slide something thin such as a knife between the two glass panes. You can try a thin rag on the knife with glass cleaner. Hope yours has one!
Use Clorox Soft Scrub and rub with a Mr Clean Magic Eraser. It
is truly MAGIC! I also use the magic eraser to clean the surface of
my stove all the time. Doesn't scratch it and takes all the grease off