Is this a brand new stove? As in, not seriously heated up previous to this season? If so, could it be off gassing?
And speaking of off gassing, are there newly finished things immediately adjacent to it? I had a friend who had serious issues with off gassing for a long time....
This is so interesting @goldenoakfarm - perhaps the kitchen cupboards are playing a role. I'll look into this (not that there's much I can do to change things). Thanks for this insight, I would never have thought of it.