Lay down a few paper towels. Pour leaves on top and gently roll them up to remove the water from the outside. The drier they are without water the crispier they will get.
Put into a bowl and spray with olive oil so all pieces are coated but not drenched. Preheat air fryer to 350 degrees F.
Sprinkle sea salt on and toss so all pieces have salt. Spray air fryer basket with olive oil spray and pour in spinach.
Cook for 6-8 minutes, start at 6. Toss after minute 3 so they get nice and crispy. If after 6 min. they aren't as crisp as you'd like add 1 more minute at a time until they are perfect.
Notes
Tender Spinach in Air Fryer (Option 2)
Rinse about 10 oz. fresh spinach leaves under cold water. Squeeze out water. Put into a deep oven safe cake pan with 2 tsp butter on top and season with 1 tsp garlic powder + pinch of salt and pepper. Put into a preheated air fryer basket at 360 degrees F for about 3 minutes, move leaves around until wilted to your liking.