Put Cheerios, Rice Chex, Wheat Chex, Cheese Itz and Pretzel Sticks in crockpot and mix completely
In a small saucepan, melt the butter and whisk in the garlic salt, onion powder and Worcestershire sauce
Pour over crockpot mixture and mix completely (make sure all of the snacks are covered)
Set on high for 1 hour, mixing every 15 minutes
Let cool and store in Ziploc bag or container.