Preheat the air fryer to 400°F
Wash and dry the potato
Pierce the potato several times with a fork
Rub the potato with a little oil
Sprinkle with salt if desired
Place the potato in the air fryer basket
Cook for 35 to 45 minutes, depending on size
Flip halfway through cooking
Check for doneness by piercing with a fork
Cook a few minutes longer if needed
Remove and let cool slightly before serving