Firex 12000 series. My smoke detectors have been going off every 20-40 minutes for the last 7 hours. (All night long!) I can't get them to stop. I have changed the batteries, held the button down on them to see if that would work. I am about ready to take a baseball bat to them! Please help!!! How do I make them stop! It is a smoke detector/carbon monoxide detector Heathersf78@gmail.com