Pat the chicken thighs dry with a paper towel.
Lightly season both sides with salt.
In a bowl, combine garlic, gochujang, soy sauce, rice vinegar, honey, sesame oil, and gochugaru (if using).
Coat the chicken thighs evenly with the sauce.
Let them marinate for at least 30 minutes.
Lightly spray the air fryer basket with oil.
Place chicken thighs skin-side down in the basket.
Air fry at 380°F (193°C) for 20–25 minutes, flipping halfway through.
Cook until the internal temperature reaches 165–175°F
Let rest a few minutes before serving.
Enjoy.