Ultrasonic cleaning brass - what solution to use?

What size? I have a small lyman. 1/2 teaspoon citric acid, drop of dawn dishsoap. Cleans 100 .223 brass with 2-8min. cycles. The Lyman solution is pretty good stuff too.
 
In 600ml beakers I use 50/50 vinegar/water to start with a few drops of dish soap, then cold water with a few shakes of langostina pot cleaner, cold water with 1/2 teaspoon of baking powder, hot water, then final rinse with cold or distilled water.

You get really shiny brass this way, inside and out. The 6mmbr link is good. I basically use their recipe and went from there.
 
In my own ultrasonic I've used about a 1:3 mix of vinegar to water with a little dash of liquid clothes laundry detergent. Then a 3 minute cleaning cycle in my cleaner with the temperature set to around 60°C. Gets the insides and outsides nice and brassy.

I run the mix for around 4 or maybe 5 batches then switch to fresh mix. It's pretty muddy by that time but still cleans well.
 
I have a Hornady 2L and use their cleaning solution! With the basket full of cases, ill do 3 30min cycles, then rinse them in water and wipe off and they come out nice and shiny
 
I used to use the vinegar/dish-soap/baking powder route, but my brass would tarnish terribly after a few days no matter what I did to neutralize it. Now I just use the Lyman solution. Easy and effective. I re-use the final distilled water rinse cycle by adding solution to clean the next batch.
 
I use either the Lyman or some lemon juice and dish soap. I run it 2-3 times for each batch (I think mine is the 2 litre modle so it holds quite a bit.) Once done, hot water rinse, lay out on a towel and dry. Brass stay much nicer with the drying - no tarnishing or water spots.
I usually run the cleaner for the day - as many cases of different sizes as I have that day, usuallu I de-cap and clean in big batches, so prolly run 10-20 times eash session. First load gets as clean as the last load.
 
I use city water and nothing else. not really worried about a shiny brass case just getting the dirt and powder residue off them. no sense in adding extra cost when you don't have to.
 
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