Cooked chicken can be stored in an airtight container in the refrigerator for 3-4 days. Pound the chicken to an even thickness to ensure uniform cooking. Always use a meat thermometer to check for doneness; the internal temperature should reach at least 165 degrees F. If your chicken is still frozen inside after cooking, increase the cooking time as necessary. To reheat, place the chicken back in the air fryer at 350 degrees F for about 5-10 minutes or until heated through.