Peel the sweet potatoes and cut them into sticks. Thin sticks for crispy texture, thicker ones for chewy texture.

Soak the sweet potato sticks in water for 10 minutes to remove excess starch, then drain and dry thoroughly.

Place the sweet potato sticks in a plastic bag, add 1/2 tsp fine salt, and shake well to evenly coat.

Add 2 tbsp cooking oil to the bag and shake again to coat the sticks evenly.

Spread the sweet potato sticks in the air fryer basket without overlapping. Cook at 180°C (356°F) for 10 minutes, then flip and cook for another 10 minutes.

Let the cooked sweet potato sticks cool on parchment paper for a crispy finish.