Line a baking sheet with parchment paper.

In a small saucepan melt the butter. Add the worcestershire sauce, salt, garlic powder and onion powder.

In a large mixing bowl put the corn chex, rice chex, mixed nuts and pretzels. Pour the butter mixture over this and stir to coat everything.

Pour the mixture into the basket of your air fryer. Shake to make an even layer.

Air fry at 350 degrees for 7 minutes.

Immediately remove the mix from the air fryer and pour onto the parchment lined baking sheet. The chex mix is very hot and will continue to cook and sizzle a little. Let the chex mix cool completely before you move it to an air tight container or bag to store.