Grease the Air Fryer Basket with cooking spray and then slide inside.
Adjust the temperature of Air Fryer to 320 °F to preheat for 5 minutes.
After preheating, arrange the peanuts into the greased Air Fryer Basket in a single layer.
Slide the basket into Air Fryer and set the time for 9 minutes.
While cooking, flip the peanuts twice.
After cooking time is finished, remove the peanuts from Air Fryer and transfer into a bowl.
Add the oil and salt and toss to coat.
Again, arrange the peanuts into the Air Fryer Basket in a single layer.
Slide the basket into Air Fryer and adjust the temperature to 320 °F for 5 minutes.
After cooking time is finished, remove the peanuts from Air Fryer and serve.