I tuned a 35 year old Steinway M yesterday that had this greenish-blue growth on five or six of the agraffes. It had grown so thick that it had stopped two strings from ringing. After wiggling the muted strings, they broke free and began to sound again, so I tuned the piano and left, leaving the green stuff on the agraffes. If I would have had my protek with me (my car was a block away), I would have lubricated the area. Was that a good idea? Was that stuff verdigris? (I thought it only grew on action centers). Is this a common occurrence? Did I do the right thing? Will that stuff clog the agraffe holes again and cause a call-back? Not knowing what to do, I decided to "do no harm," get out of there, and recommend a more experienced tuner(maybe me, by then) if it recurs. What should I have done? Phil Ryan Miami Beach
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