I had spray deodorant set my old one off.
I could never determine what was setting it off, propane or CO. So, I replaced it with just a propane detector (same company, same size, fit right in), and installed a CO detector up higher on the front of the sink/stove liftover.
Propane is heavier than air, CO is lighter; never made sense to have the CO detector down an inch or two from the floor.
Trailer: Lifted 228BH, heavy duty springs and Yokohama tires
TV: 2016 GMC Sierra Z71 4x4 CC, SLT
Spare TV: Two Alaskan Malamutes
Living somewhere in ID; previously lived in Moab UT; previous to that, don't ask!