Back in early November, I was making a tangy mustard sauce for pork and completely forgot about it. I went into another room while the sugar, mustard powder, egg, and vinegar boiled away for about half an hour, until all that was left was what looked like a ruined pot. We tried everything to get the pot clean, turning to Google for all the answers. Boiled water, soapy water, baking soda, vinegar, peroxide, scrubbing with a metal scouring pad, and every combination of those, plus a few more…