Dry chicken drumsticks with paper towels and then place into a large bowl.
Season chicken with garlic powder, oregano, salt, and pepper. Massage chicken and let marinate for 30 minutes.
In another large bowl, whisk together eggs and milk, set to the side.
In a large bowl or pan, whisk together Argo cornstarch, flour, sazon, Adobo, and oregano, set to the side.
In steps, you will take the seasoned chicken, and one by one, dip into the egg wash, then roll into the Argo cornstarch and flour mixture.
Continue until all chicken is done.
Preheat air fryer to 390 degrees Fahrenheit.
Spray bottom of Air Fryer basket with cooking spray, add a single layer of chicken without chicken touching. Spray generously with more cooking spray.
Cook for 25 minutes, or until chicken reaches 180 degrees Fahrenheit.