[Jeff Beckman]

If your CO2 detector is going off all the time. It needs to be replaced, they sample air non stop. Once they collect so much polution they can no loinger make the distinction. Spraying fabreeze and the like, shortens the life of a CO2 detector substantialy. So in all likelyhood, you just needed to replace it, I would not just delete it. You can get a new one on ebay or other auction sites for a fair price. What is your familys lives worth?