I changed a battery in the carbon monoxide detector because I found that the battery was low after I heard the audible buzzing several times tonight. I put the detector besides me on the sofa while I was watching TV.

No sooner than I had a gas coming out underneath the detector fired like crazy with a reading 245 (the highest level of carbon monoxide detected!)

I began to believe that the gas from body might contain CO that neither has color nor odor.