Google Nest Community

I have 3 protects and 1 of mine started chirping for no reason. Nothing in the app to give me a reason just keeps going off every few minutes. Turned the power off and on. Still chirping. Pressed the button to get status, just says "Ready to Test". D...

Had this for just over a year and recently noticed that the top of the doorbell looked like it had some sort of residue building up. When i tried to clean it more of it flaked off and i realised that it was the top coating of the doorbell coming off....