buy another string and send yours back.i had the same problem with winners choice stone mountain all on bowtech bows have 3 now love them. anyway make sure your cam is not over rotating this is what kills the string. the marks on the cam only get you close to say 80% letoff if you have a lot of valley you are over rotated your string will be in contact with the axle which does in the string.i have not had any problems with my bowtechs since i keep a eye on this good luck.