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Possibly, although bigger cases might not get enough heat at the head to take out a large amount of moisture?

You can see on the photo of the cases where the contact patches are - these are where you get tarnishing starting for some reason. I tend to wait until I have enough to stand them up on their necks...

The propriety stuff sold as ultrasonic cleaner fluid in the US is basically just showerpower bam. Spray bottle at the supermarket... It's a citric acid and natural plant based stuff that's pretty...