1. Peel the sweet potatoes, then cut off the narrow ends.
2. Halve the sweet potatoes crosswise, then cut each half into 6-millimetre-wide sticks.
3. Toss the cut sweet potatoes with the cornstarch, oil, and 1 teaspoon of the kosher salt until fully coated.
4. Place the crisper plate into the Cosori Smart Air Fryer basket, then place the sweet potatoes onto the crisper plate.
5. Select the Air Fry function, adjust temperature to 205°C and time to 15 minutes, then press Start/Pause.
6. Remove the sweet potato chips when done, sprinkle with the remaining salt, then serve immediately.

Note: To recrisp your sweet potato chips, set temperature to 205°C and time to 2 minutes, then press Start/Pause.