Just bought the AirFryer XL a month ago. Haven't done fish in it yet, but I've been watching a bunch of Youtube vids of others doing it. You actually use a little bit of oil, but only a teaspoon or a bit of cooking spray.
SoonerDG, you'll probably have to experiment a couple times to get it how you like it. I figure on messing up a few during the learning curve.
These air fryers are basically a small convection oven. Just a heating element and a fan.
Fishin' to stock Lake Crisco.