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.