X3, throw the old stuff away. The advancements in fibers over the last few years have produced superior results, especially where crossbows are concerned. Make sure what ever you decide to use is applied very tight!
Matrix 355 (Trixxi) Tact Zone - Gold Tip 18" Laser 2 Bolts 100 grain Cabelas Copperheads - My wicked ass strings!
Vortex (Roxanne) - Redfield Revenge
Gold Tip Laser 2 Bolts - 100 Grain NAP Thunderheads - S5 system - My wicked ass strings!