Kind of off topic but I recently found that PETG was making me wheeze and wake up coughing.
My M2 is in a closet in my bedroom and recently I started having horrible coughs and wheezing. It would actually wake me up in the middle of the night.
Took a close look at what had changed recently in my environment and removed each item for a week.
Figured out the yellow PETG was the cause. To test after a week of not using it and having my cough/wheezing disappear, I fired up a print using the yellow and sure enough within 5 min of extruding I was coughing.
Sucks because its my favorite material to print with.
Anyways printer is going into a separate room and I bought a respirator to wear when I'm working with it.
Don't have the issue with PLA, ABS, PET+.
https://www.3dhubs.com/honolulu/hubs/john-ross