Pre-heat your griddle over low heat. Make sure that it's clean. Depending on the size of your griddle, you might have to make the mix in batches. The easiest way to do that is to halve the mix and butter mixture first.
In a large bowl, combine all of the Chex Mix ingredients.
Melt the butter in a small bowl or pot. This can be done directly on the griddle.
Stir in the Worcestershire sauce and hot sauce.
Add seasoning salt to the butter mixture and stir to dissolve and combine.
Drizzle the butter mixture over the Chex mix and stir well to combine. Take your time, get it all well-coated.
Add the Chex Mix ingredients to the griddle. Immediately spread it out.
You want to toast the mixture for 2 minutes. Keep it moving constantly or it will brown. You want it to get a little color to it. A little char here and there is fine too.
Keep the mixture moving as you continue to toast it. You'll need 5-10 minutes to get it to the desired color and crispiness.
Immediately remove the mix to a large baking sheet (or two) and spread out to cool slightly.