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I got the screw off but I have another problem totally new to me.

I had a strange chemical reaction in my ultrasound tub. A lot of brownish yellow material appeared from nowhere and has really made a mess of many of the parts.

I've never had this happen before. I'm not sure if has something to do with a chemical reaction between the cleaner I use and some of the metal parts on the AS589 or what. 

Has this happened to anyone else?

Very strange!

 

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I have been using L&R cleaner and rinse in my US that was really made for use in mechanical cleaners. A few weeks ago, I had something similar happen, causing me to re-clean in my mechanical cleaner. I cleaned the SS pots with denatured alcohol and started with fresh cleaner and rinse. It has been fine since. I suspect that it was a reaction from a movement that had WD40 or something sprayed on it, or some other bad oil. I am not sure though. But it the symptoms were similar to what you describe.

What cleaner were you using?

 

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