We have really hard water here in AZ, and it's very frustrating to see your wet tumbled brass end up with water spots.
I started doing a "final rinse" on my brass with a gallon of distilled water, and then hitting it with the leaf blower for a minute and everything is purdy like it should be now. It's well worth the 83 cents.
Not sure if I even need the leaf blower, but who doesn't like operating one?