I recommend keeping them in there for 10-15 minutes. After the first 5 minutes, take them out and shake them around the air fryer basket. Then throw them back in for another 5 minutes to finish them off. This will give you the perfect crisp! Some people enjoy a little more crunch to their fries. If that is you, add more time! However, do keep an eye on your fries, you don’t want them to over cook or burn.