u/DoraForscher

I was cooking some sauce a while ago and it burnt at the bottom. I used barkeepers at that time to try and remove it but that dark staining wouldn't budge.

I also make bread in it at 425°F

I've used all the tricks from boiling vinegar and water, baking soda and water, oxiclean and water, left it to soak in bleach over night, same again with oxiclean. This is the best I can get it. The yellowing was turmeric. It's smooth, but not glossy anymore. It doesn't seem to be chipped per se, but is that dark patch the cast iron poking through? Is the ceramic blown?

Any thoughts or suggestions? I can't tell if I should stop cooking soups/sauces in it and just save it for bread moving forward...