Method for automatically, with the aid of a processor, determining a surface degeneration of a first surface of a urine handling system, the first surface being intended to come into contact with urine, the method comprises the following main steps: a) repeatedly measuring one or more capacitive values of the first surface, forming capacitive measurements； b) storing all, or representative instants of the capacitive measurements； c) deciding, based on changes of the stored capacitive measurements, that a significant surface degeneration of the first surface has occurred.
