Okay I went for it! I had a really hard time because the front glass of our oven is broken. We've tried to replace it but can't find the right size :(
Edit: Clarification- There are two layers of glass for the oven. The inside part is broken- you can see the missing chunk. The oven still works fine. The broken glass just makes the glass extremely hard to clean and residue can get in between the two layers. I didn't want to press too hard on the glass in fear of breaking off another chunk so I did lots of "little circles" with my scrubbie.
Dirty Oven:
Ya, that darkness in the back is burnt on crap...
Cleaning the oven:
Still Cleaning:
and the racks:
Finito. I would have liked to do more on the glass but I was starting to feel it flex and shift :(