2. The principle of air fryer is to use air to form convection similar to high-temperature hot air to heat food, and at the same time, hot air can blow away the moisture on the surface of food to achieve the effect similar to frying. The crispness of French fries may be caused by too much water in potato ingredients.
3. The reason why the French fries in the air fryer are not brittle may be that the potato varieties used for French fries are rich in water, so that the hot air in the fryer can only blow away the water on the surface and cannot completely disperse the water inside.