01 - Preheat the air fryer to 380°F (193°C) for 3 minutes.
02 - Rinse the potato sticks in cold water to remove excess starch, then drain and pat completely dry using paper towels.
03 - In a large bowl, toss the potatoes with olive oil, sea salt, and black pepper if using, ensuring an even coating on all fries.
04 - Place fries in a single layer in the air fryer basket. Cook in batches if needed to avoid overcrowding.
05 - Air fry for 18 to 22 minutes, shaking the basket halfway through cooking, until fries are golden and crispy.
06 - Transfer fries immediately to a serving bowl and sprinkle with additional sea salt to taste. Serve hot.