I think there is something to the power supply possibility. Today I noticed that just putting my cell phone next to the CO detector will set it off - and it even gave a 200 PPM warning when it's been reading 0 PPM for days.
I have the CO detector because I had actual CO issues in my apartment...
Hi, I have a small handheld CO detector (https://www.amazon.com/gp/product/B08SQPKTGN/?tag=pfamazon01-20), and I've noticed that leaving it on my desk near my monitor will invariably trigger the alarm. There are magnets that are housed at the base of the monitor (an old mac Thunderbolt display)...