I just got my Switchback, so it doesn't have much wear on anything yet. It is also my first Mathews with the String Suppressors. However, it is my understanding that these will wear out, but I don't know how long that is supposed to take. If I was you I would talk to your Mathews dealer, there may be a tuning problem or it may be normal. Either way, he is the one that can answer the question best for you.
check the setup on bow. if ATA or brace height has changed the suppressor will cut. also make sure cam is in time. the suppressors are marked for cam and idler, they are different. cable stretch will cause this.
From what I have seen on the switch if the string &/or cable has streyched you will get wear in the suppressors/check the string & cable, axle to axle & brace heigth. Make any corrections needed & it should stop the wear.
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