My guess is to check the ATA for proper distance. Also check the upper cam for any leaning at full draw. Cables might have stretched out causing the noise if the string is in good shape.

Good luck I had a a similar issue with my OutBack and replaced the strings and cables and it's back to like it was out of the box. I had a Baracudda set on it and replaced it with aProstrings setandyou feel the difference, much better.