PS: Supplement. The headphones are after 2 months in the bucket. The inner workings of the handset is protected only by a very thin Kunststoffhäutchen. Penetrates earwax, it lies down over this membrane vibrates probably not with how it is and that's it then. So a handle in the toilet, I had long no longer.
Meanwhile, Amazon has changed the headphones as a warranty claim. Very accommodating and smoothly.