I don't have a Mathews but as a general rule I think most guys should replace their string every 1-2 years and the cable(s) at least every 2 years. I make my own and replace them every year and as a set (this way I know when both where changed). I've helped at a shop and have seen too many come in 4-5 years old that just break under the nock point. Just seems wiser to be cautious. I know the cost of string and cables holds alot of guys back but if you check around you can find good sets made for up to 1/3 what some companies are charging.