I'd call the manufacturer. If they are still under warranty, they will send you a new one for free. I've had this problem with smoke detectors I bought last year, and it is maddening.

Anonymous wrote:You can call your local fire station. Google the number. They will come out.

To inspect or to install a new one?

99% sure whoever installed your smoke detectors used the batteries that came with the smoke detectors. They're crappy and old. Replace them with Duracells and the problem ends.