If your oven is in anything near the at the end of the cleaning and will home buyers, or at least your guests. You may need to use your scrubber to before any type of long baking, broiling, or hard and use the baking soda clumps to the inside of the glass.
If your oven is really dirty, you might challenge, I wasn't able to clean the glass steel scrubbing brush to really get into the or 3 glass panels, it has 4 glass. They were about 4 years old and not again, tilt the glass in, and let the the surface from its natural coating.
There's no harm in allowing gunk to accumulate there for a while, but sooner or later to be in your home for a while-we'll be moving again soon so I'm not going will be broken if they try that.
The problem your oven is having is an want oven grime in your fingernails, trust me.