Quote Originally Posted by davemuzz View Post
I have one of the first Hornady ultrasonic cleaners. It does not have a heater in it and does a great job on brass. From what I have read, you only use the heater when you are cleaning parts or metals other than brass. (Don't use the heat when your cleaning your brass) The heat will tarnish your brass and not clean it as well as will cold distilled water. I have no proof of this. I'm just telling you what I have read from the experts that write for the reloading magazines. (Not internet dwebs)

Dave
I can believe that on the hot water, I hot water washed some 38 in my stainless pin tumbler and it all came out funky colors and that was the only time I used hot water and it did that so the same reaction could occur in the ultra sonic.