I use a 2.5 liter sonic cleaner from Harbor Freight. It's just like the Lyman sonic cleaner.
I dilute CLR cleaner (from my local home depot) 1:50 with HOT tap water and add a few drops of liquid laundry detergent. Run it through 4 cycles of 480 seconds each. That's the longest you can set this sonic cleaner's timer for. Rinse in tap water, drain, wrap the brass in an old towel for a minute and then dry in a 175 degree oven for about 20 minutes.
The CLR solution works as well as the Hornady stuff at a fraction of the cost. I've tried a 5% solution of citric acid too but I have not found a good source for bulk citric acid at a reasonable price (I don't want to buy 50 pounds at a time).
De-prime all brass before sonic cleaning.
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