Use any type of cheese that melts well, such as sharp cheddar, white cheddar, mozzarella, Monterey jack, pepper jack, provolone or American.
Medium thickness bread is best. Bread that’s sliced too thinly will dry out or burn in the air fryer. If you use a thick-cut bread you may have to add a few minutes to the cook time.
Check on the sandwiches often as they cook. The cook time will depend on the thickness and type of bread you use, and may also vary between air fryers.