No, I know what you're saying. That was my exact thought--there must be some part of the string that ISN'T coated and thus could be grounded. Well, yes, the core of the string is grounded by the ball-ends (this is a traditional P bridge). I know this because touching the tuners eliminates the buzz, as does touching the string behind the saddle, where the playing wraps end. The kicker is, the part of the string that you play on is coated, so even though the core is grounded (and I'm sure the wraps are too), the coating is coming between my fingers and the grounded metal of the string. There is no solution, other than scraping off the coating between the pickup and bridge, or getting normal strings.