I gave it a second pass with vinegar + water after seeing a stain on the side wall. This time I used 1.7 L and 1.7+ L of water. I started with 1.7 then filled water up as high as possible.
The only modification I made to the technique was to have the heat at 7.5-8 until I started to get mist, in which I would switch to low and let it sit on the burner. This took me about 20+ minutes.
It looks factory new outside of the scratches