Preheat the Air Fryer: Begin by preheating your air fryer to 350-375°F (175-190°C). Preheating ensures that the sandwich crisps up evenly and quickly.

Prepare the Sandwich: If your sandwich contains delicate ingredients like lettuce, tomatoes, or sauces, consider removing them temporarily to prevent sogginess during reheating. You can add these ingredients back later.

Wrap the Sandwich (Optional): To retain moisture and prevent over-crisping, lightly wrap the sandwich in aluminum foil, leaving the top open for air circulation. This step is optional but can be helpful.

Reheat the Sandwich: Place the prepared sandwich, either unwrapped or in the foil wrap, into the preheated air fryer basket. Allow it to cook for about 3-5 minutes. Keep a close watch on it to prevent overcooking.

Check for Doneness: After a few minutes, carefully open the air fryer and check the sandwich. It should be hot throughout, and the bread should have a crispy exterior. If necessary, continue cooking in 1-2 minute intervals until you achieve your desired level of crispiness and warmth.

Add Delicate Ingredients: If you removed delicate ingredients earlier, such as lettuce or tomatoes, now is the time to add them back to the sandwich.

Serve and Enjoy: Once the sandwich is perfectly reheated and crisped to your liking, and any fresh ingredients are added, carefully remove it from the air fryer. Be cautious as it may be hot. Serve immediately and savor your rejuvenated sandwich!