bought this headset yeatersay from offline store. Near the tip of the usb the braiding has some thin stitching/strands coming out. Is this a defect? Also i was thinking to just use lighter and put a little fire there for a split second. Fire makes those small loose stitches tighten up. But will that be safe? Would d fire melt or harm anything inside the usb? cant replace it as i bought from offline store..