OKAY REAL QUESTION I need actual help

I have a wired in fire alarm. The one on the main floor keeps fng chirping. I changed the battery. Changed the one upstairs. Held the "test" button on Main Floor. Tried a new battery.

Is a bat next? KFC

#homesafety #firealarm #homerepair #firealarm #help #wtfITWONTSTOPCHIRPING

@struggle_bus My sister's house has wired ones, one went bad and made them all chirp. One other poster said to clean the sensor, compressed air when you find where yours is at might do the trick.