Read all you can on the tuning topic, and don' t be afraid to try it, you will find it rather frustrating at first, but stay with it. Learn how to do it, if you are like me you may be miles from a bow shop during hunting season to fix a small problem, being self reliant with this bow stuff is a good thing I' ve found.
My local shop charges 35 bucks for what they call a " super tune" , this consist of breaking the bow down to every axel and bolt and lube and clean everything, then reasemble, and shop tune the bow, but even after that I still have to fine tune the bow to my shooting form and style. One thing about tuning....you can' t tune out bad form, *L* it took me about 2 years to figure out that one