Limescale (calcium) build up in kettles
Most of the water kettles in Europe I come across have a heavy, unsightly layer at the bottoms of lime scale (top photo). The hardness of the water here (large amounts of calcium/lime) leaves this residue inside the kettles through usage.
But don’t confuse this problem with poor water quality. The quality of water in Germany is excellent. The hardness of the water is simply a side effect since since water here comes from the ground (not the rain water I’m used to in California).
Cleaning your kettles is easy with LEMON JUICE or VINEGAR! Pour in a large amount of either plus water and bring it to a boil. Pour out, repeat, then finally rinse until the residue is gone (bottom photo).
You can do the same with your stove top coffee makers.