Again and again in the forum you come across the diagnosis: “the classic, water in the footroom, Kessy drunk off”. This is all the worse because you don’t notice it for a long time. Only when moisture has enough time to act, there is corrosion and the problem comes to light but then really massive and expensive. In the appendix three methods with which you can determine whether the “bath season” was opened. This is not a protection against water intrusion, but a reliable warning so that you dry immediately and K orrosion in the Kessy can not arise at all. I ask the professionals for indulgence for the detailed description, but lay people are grateful for an instruction at which each step is explained exactly. LG Günther