“Oh God!! I should not have tried to oil the piston of our doorbell.” I could just say this to myself when yesterday the doorbell stopped working properly in the evening after I oiled the piston. I contacted the Cypress Electricians and explained them about the problem that I am now facing. They came in a very short time to my house and checked on the doorbell. The piston of the doorbell has become totally worn out and need to be replaced, they told me. On replacing the piston also the doorbell didn’t work properly and they had to change the entire bell unit.