How does the old doorbell keep the sound of opening and closing?

1. First, open the shell of the doorbell and check the electrical components and mechanical devices inside the doorbell. Confirm that the switch contacts are working normally without looseness and corrosion.

2. Secondly, adjust or clean the contact point between the button and the bell to ensure that they can be closed normally and make a clear closing sound.

3. Finally, replace the spring or mechanical device to keep the original closing sound.