We just tried out a new one from an unopened package by putting it in a large inverted pot with a burning candle in it. The candle eventually went out from lack of oxygen but the CO detector did not go off. We took it to a local firestation to report the problem new device and they had absolutely interest! My wife then called the Anchorage Fire Chief's office to let him know there are some defective brands out there and they similarly showed absolutely no interest. What is wrong with this picture?