Siemens washing machine knob no damping feeling

Siemens washing machine knob no sense of damping because the mechanical structure because of wear and tear have problems. Siemens washing machine switch knob no sense of damping, the reason is that the mechanical structure of the key switch due to wear and tear have problems, due to the washing machine has not carried out a unified design, the parts of the washing machine produced by various factories are not the same.