AFAIR, I've posted about five times - at least - that the Kleneeze 'miracle cloth' will clean up your stainless steel ROA with little effort. I'm not saying that you just wave it and the job is done, it DOES require you to participate by indulging in a little manual labour, but it's a lot cheaper than any Ultrasonic cleaner.

It is EXACTLY the same as the much more expensive Birchwood-Casey lead remover, and will, just like that item, remove your bluing if you have any, since it is designed principally for bringing a fine surface shine back to uncoated metals, like the stainless steel that the ROA is made from.

AND it costs half as much and is twice as big for your money.

tac