Preheat the Air Fryer: Turn on your air fryer and preheat it to around 350°F (175°C). This step helps ensure even reheating.

Choose an Appropriate Dish: Transfer your oatmeal to an air fryer-safe dish. If you’re concerned about the oatmeal sticking to the dish, a light spray of cooking oil or a butter lining can help.

Reheat the Oatmeal: Place the dish in the air fryer basket and set it to reheat for about 3-5 minutes. The exact timing might vary based on your air fryer's model and the amount of oatmeal you're reheating.

Stir Midway: Halfway through the reheating process, open the air fryer and give the oatmeal a good stir. This ensures that the oatmeal heats evenly and helps to maintain a creamy texture.

Check Consistency: After the total reheating time, check the oatmeal. If it’s not warm enough or if you desire a thinner consistency, you can add a little more milk or water and heat for an additional minute.

Serve and Enjoy: Once the oatmeal is reheated to your liking, carefully remove the dish from the air fryer (it will be hot), let it cool for a brief moment, and then add your favorite toppings, such as fresh fruits, nuts, a sprinkle of cinnamon, or a drizzle of honey.