Are they the original set of strings and cables on that bow? If they are, I'd replace everything. A good set of strings and cables will run you anywhere from 50-100 dollars. A good, prestretched string will give you quite a few advantages to the stock string on your bow. For one, ZERO peep rotation once the new set settles in. Secondly, cam timing stays where you set it. And last, they are just a better quality product.

I've said this before. But your strings and cables are the most important part of your bow. They hold the thing together.