Originally Posted by
YVR Cockroach
Its the fish oils (or really, oils of anything that might smell). Other than having an effective extractor fan... (lots on the market are either ineffective, improperly installed or don't vent outside).
If sauteing fish, try the old trick of cooking with vermouth.
It's been a dozen years and at least 3 houses since I had an exhaust fan that vented to the outside. I tried the charcoal inserts and they helped some but not enough to eliminate the stink.