Hi guys, 
thought I would post on this thread, I have been mixing my own solution as Bob has in his videos, works good, I have recently been baffled about some brass parts turning color, darkish, and not cleaning as well. I thought I was heating up the solution too much or something. It has been a mystery. JUST this mourning it dawned on me, I had bought some cheap wire strainer baskets and would put smaller parts in them and hang them into the ultrasonic cleaner. today I did not use them and everything cleaned up real nice and brighter than usual. I believe, but could be wrong, that the type of metal used to make these strainer baskets has been causing the problem. Any thoughts on this or has anyone else dealt with this??????? if I buy new strainers I will find stainless steel one and I think that will be better 
. William
