<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>I saw a similar situation in a church piano.  After investigating, I discovered the custodian was "saving money" by using hardware store-type dehumidifier additive (the kind that Dampp-Chaser warns about - evidently containing some sort of acid).  The pins and strings were rusty, and the Dampp-Chaser itself was so rusty that when I inspected it, the metal parts just crumbled.   This was a very old unit (the kind with the one orange light), but I'm sure the same could happen on a newer unit as well.</DIV> <DIV><BR>> I have a new customer with a Kawai RX-3 equipped with a Dampp Chaser with<BR>> the model H-4 controller. The piano is about 3 years old. As I opened the<BR>> lid to tune, I noticed rust on the tenor strings, and as looked closer,<BR>all<BR>> of the bass strings had discolored from what seems to be a serious<BR>humidity<BR>> problem. There was rust on almost all of the strings, and the tuning pins<BR>> had discolored in the bass section.<BR>><BR>> all of the plated steel brackets<BR>were<BR>> rusted along with all of the screws used to hold the wiring. Even the<BR>steel<BR>> rod (that goes through the soundboard) from the bottom was totally rusted.<BR>> Even the brass cap was discolored.</DIV> <DIV> </DIV> <DIV>- John Radley<BR></DIV></td></tr></table><br>