Beware of good intentions of cleaning people!! I had a similar situation at a recording studio. I had noticed some odd substance with an oily appearance on all the strings; little brownish spots. For a while everything seemed fine, but eventually the bass went very dead. The only thing I could think of was when they cleaned the studio they also sprayed some cleaner/wax stuff on the piano to make it sound "pretty", I suppose. You know how much better your car drives when it's clean!! Before your major concert I suspect someone decided the piano needed to look as good as it sounded. Just a theory, vandalism is always a possibility these days. David Denison, RPT Long Island, NY
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