I had some burnt evaporated milk on the bottom of my jug last night. I let it soak in bicarb and hot water overnight, but it was still stuck on this afternoon. I tried gumption and hot water, and it still didn't budge. I tipped it out, added some boiling water and more gumption and set it going for 3 minutes, speed 1 on the cook (varoma) setting. All the stubborn burnt bits just floated away and I was left with a clean bowl.