Preheat air fryer at 350° for 5 minutes. Run frozen dogs under water and use a butter knife to carefully separate hot dogs. If they cannot be separated, cook in air fryer for 5 minutes.
Use a sharp knife to cut a line down the center lengthwise of each hot dog to allow steam to escape. Spread hot dogs in single layer, cook 8-10 minutes.
If you want them extra crispy you can spray with olive oil and cook another minute.
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Notes
How Long to Toast Hot Dog Buns
The buns can be heated in the air fryer as well when these are done. Remove dogs and place a piece of foil on the bottom. Open each one up and place open side up in a single layer, cook 2-3 minutes for warm, lightly toasted buns. Top with your favorite toppings.