First, I scooped out all of the chunks from the bottom of the oven as best as I could.
Over the course of a few days I sprayed down the oven with water mixed with 2 Tbsp of baking soda, as suggested by a reader on the cleaning with baking soda post(Thanks Calliope!). You can still bake in your oven after spraying it, since it’s just baking soda, but it will turn a lovely shade of white on the inside. I probably sprayed it around 5-6 times total.
Then, after baking some cookies, while the oven was still a little warm, but not hot, I used a green scrubbie and a rag and scrubbed and wiped that baby out! I was pleasantly surprised by how easily stuff came off without excessive scrubbing on my part. And it was actually kind of nice that it was all white on the inside because then I could tell where I had cleaned and where I still needed to wipe off.
Finally, I turned on the oven to the lowest temperature, which is 170° on ours, for about 20 minutes just to dry it out so it’s all ready to use the next time I need it.