Add Chex, Melba Snacks, Pretzels, Cheez-Its, and Cashews to Crock Pot, and stir well to combine.
In small bowl, combine Ranch Mix packet, Parmesan Cheese, Salt, Onion Powder, and Garlic Salt. Stir well to combine.
Pour seasoning mixture over snacks in Crock Pot, and stir well.
Then pour melted butter over snack mixture in Crock Pot, and stir well.
Cover Crock Pot with lid, and place a paper towel just under the lid to collect the condensation when cooking. {this will keep your Chex Mix nice and crispy.
Cook on LOW for 1.5 - 2 hours, or until done. Make sure to stir well at least every 30 minutes to avoid burning.
Once done, spread Chex Mix out on wax paper on the counter to cool. ENJOY!
Storage Tip: Chex Mix can be stored in an airtight container at room temperature for up to 1 week.
Notes
I used 7 quart crock pot, but recipe can be cut in half and made in a smaller crock pot.