[emrvb]

I've had similar issues, but since I also experienced it near electric stoves it wouldn't be caused by the burning of gas.

I've hypothesized it is caused by overheating cooking oil.

Before induction cooking, gas stoves generally used to be able to provide more heat than electric ones. So its easier to cook hotter and burn more oil with those stoves.

Might be something else entirely in your case.

[neilv]

FWIW, I was seeing it only with boiling pasta and vegetables in stainless pot on a newish gas stove. (Sometimes draining and then heating with olive oil in it, but on a lower temp.)