Pre-heat the air fryer to 375 degrees.
Liberally season the wings on both sides with kosher salt & freshly ground pepper.
Place the potato starch in a bowl, then coat the chicken wings on all sides, shaking off any excess starch.
Place the wings in the fryer basket, leaving room so they don't touch each other. This will help make them evenly crisp.
Air fry the wings for 20 minutes at at 375 degrees.
Increase air fryer temperature to 425 degrees and cook for another 15 minutes; turning the wings at least once to crisp evenly on both sides.
Season the wings with more salt & freshly ground pepper right when they come out of the air fryer.