<html> I wondered the same thing, David. I wonder if the CA somehow got the cloth to hold water against the string, or something? I've never had trouble with wire breaking after I use CA at the base of tuning pins, and sometimes some gets on the coil. I've also tried it on bridge pins with the wire still in place, and haven't noticed any drawbacks so far, though you'd think it would foul the wire's contact point with the bridge. Best, Susan <blockquote type=cite class=cite cite>Are you sure it was the CA glue?  I have used CA glue to secure loose bridge pins sometimes applying the CA directly to the pins without removing the wire.  I have never noticed any tendency toward corrosion in these areas.  I have also tacked understring felt with CA at times (though not the thin understring cloth) and not noticed any problems either.    David Love davidlovepianos@comcast.net </blockquote></html>