Peel the potatoes and cut them into long, 8 mm thick French fries. (You can use a French fries cutter for this.)
Soak the fries in water for at least 30 minutes. Drain them thoroughly, then pat them dry with kitchen paper.
Preheat the Airfryer to 160°C.
Put the fries in a large bowl, drizzle with the oil and toss to coat them. Transfer them to the Airfryer basket. Slide the basket into the Airfryerand set the timer for 16 minutes.
When the timer rings, slide out the basket and shake the fries. Adjust the temperature to 180°C and set the timer for another 12 minutes.
After 6 minutes, slide out the basket and shake the fries again.
Fry until the timer rings and the fries are golden brown. Sprinkle with salt and serve on a platter.