[rohrmann]

You need to replace it. With all the outgassing of the materials these rigs are made with, the sensors in the CO detector have been contaminated causing it to be way to sensitive to hairspray and hubbies farts. Notice I said CO and not CO2. CO2 is part of what you exhale when you breathe and is not what the sensor looks for. CO is the dangerous part of what is produced by burning propane and other fuels, so that's why you have that device inside your rig. Replace it with the exact same model so it will fit the same as the old one. The new one should last much longer than two years, but normally should be replaced about every five years or so. Do not use hairspray near the detector as that will definitely kill it fast.