This is one of the biggest questions I get asked. Everyone is under the impression that when you air fry, you never use oil. That is not true. You use less oil. But if you air fry ANYTHING with a coating, it will never get crispy unless you completely cover the breading with olive oil. The olive oil helps acts as a barrier from the heating element to the batter, and if you didn't spray it, it would turn either white or brown. It would be rather unattractive to eat and VERY DRY. So, my key is any time you use a batter. You cover the batter with olive oil spray.