irst check relief in the neck by holding the lowest string down on the 2nd fret with your fretting (left) hand. Then, hold the same string down on the 12th fret with your plucking thumb and tap on the string in the middle to see how straight the neck is. There should be no more than the thickness of a business card between the string and the frets. If there is no relief in the neck, a little pressure in the middle of the neck (after adjusting the trussrod wheel) should help.