Having roughly scrubbed at the bottom with daggy dish-cleaning thingo, think to self ‘well, it’s not as-new, but as promised it is greatly improved, yep that’ll do it’, then step back and notice what you have done to the previously spotless external surface of your boiling apparatus.
And have you noticed? A story arc I didn’t have to impose on my characters? Like, it just appeared in this last post all of it’s own accord. How cool is that?