Grrrrrr, where is a Gun when you need it. The main one I believe which is located upstairs started chirping loudly nd I went a purchased a new battery and put it in, but when I did, it starts all of them chirping. I know these are more then 10 yrs old as this is a T.H. and is atleast 18 yrs old. It's driving my animal nuts and me too. What do I need to do?