Place the banana slices on a baking sheet. Coat the banana slices with lemon juice and sprinkle lightly with salt. Spray the banana slices with a little oil. Repeat.
Cook the Bananas: Place the banana slices in a single layer in the basket of the air fryer. Place the basket into the air fryer and cook the air fryer banana chips for 40 minutes.
Remove from Air Fryer: Finally, remove the thin chips from the air fryer and place on a cooling rack. Repeat the cooking process with the rest of the bananas slices