I finally dialed in a nice low action on the Warwick Streamer Pro when fretting a A#/Bb, I found a single buzz on the E string at the 5th fret (the fret behind the 6th fret note). Seems the end of the fret has lifted a bit from the Wenge board. Questions: 1. What causes fret ends to lift? 2. What would be the best way to fix this? 3. Can it be prevented from happening again? Any help would be appreicated.