everytime i excecute bends,vibratos,anything that rubs the string against the fretboard.my strings would scratch the fretboard and results in very sloppy playing i can feel the friction of the string and wood everytime i do bendings,and when i inspect my strings after playing.Therewill be bits of wood on the under of the strings and lined scratch marks on my fretboard.can someone tell me how to fix this problem?