Pull out the leftover chicken tenders from the fridge or freezer and let them reach room temperature. (In a pinch, you can air fry cold chicken tenders, but reduce the temp to 350 and add 1 - 2 minutes to each side while cooking.)

Preheat the air fryer at 375°F. 

Place the chicken tenders in the air fryer basket and ensure that none of the pieces are piling on top of each other.

Let the chicken heat up for about three to five minutes. Using tongs, turn the tenders.

Restart air fryer and heat for another two minutes. 

Use tongs to remove reheated chicken strips from the air fryer to a plate.