My smoke alarm started beeping at 5.30am. Fine I thought, it needs a new battery. Ran to shop at 6am and got one. It's still beeping!!! Can anyone save my sleep and tell me how to shut the damn thing up?! It's a kidde 9v battery powered one and it's the holding bracket where the beeps are coming from so removing the unit doesn't stop it. I've tested it (gingerly, didn't wake the kids up phew) and it works. So what's wrong with it?!