No overcooking of milk - marbles as a milkman
Have you ever overcooked the milk or something? And then this mess with the baked milk on the stove!
Earlier, grandma had a so-called milk guard or Klapperstein (glass or porcelain), which she put down in the pot. Is also hygienic, because glass or porcelain can be rinsed.
If you can not dust off such a part with grandma, just take a few glass marbles for replacement.
You'll hear it when it starts to rattle when the milk / soup or whatever starts cooking.
