Yesterday afternoon, Beeped every 45 seconds? I removed the alarm from it's holder, cleaned it thoroughly with Aerosol cleaner. It stopped beeping for about 20 hours, and now this morning started again. I again removed container, opened battery door, removed battery, cleaned all battery contacts with hydrogen peroxide, and again blew every open place with Aerosol "BlowOff Duster." Battery oroginally installed originally February 24, 2004. I give up!! I need the manual, but could not open PDF to print one.