Disconnect the smoke detector by twisting counter-clockwise
Replace the battery with a new one (this will most likely stop the chirping)
If it is still chirping, remove the battery and hold down the test button for 15 seconds to drain any remaining charge
Insert the new battery and reattach to the wall/ceiling
If this doesn’t fix the problem, please contact SCUDO immediately. Do Not Remove Detector. It is required by law.