OK, so when I was unloading the chest freezer for defrosting yesterday, I put a couple of kg of frozen apple slices into a big pot with some water, turned on the gas to boil them…and forgot until I smelt the burning. So now one of my good stainless steel pots is burnt. I’ve scraped the mess into the compost and I’ve attended to the outside with Jex and Ajax. Although Gumption paste worked a lot better than Ajax. Now I need to clean the inside, which is more badly burnt on. The internets suggest boiling vinegar and water, which I am now doing, to loosen the black stuff. Anyone here got any other ideas? I was thinking I might cut up some rhubarb leaves and boil them up (separate boiling from the vinegar one) and see if that helps. Every time I cook rhubarb my saucepan comes out lovely and shiny. I presume that is the oxalic acid.