Since we are talking about fiber optics, I have a Cobra Sidewinder sight that has the fiber optic wrapped around a plastic cylinder, which then feeds to the pin. This summer I broke off the fiber optic leading to the pin. Well I unwrapped some of the coilled fiber optic and re-ran it through the pin, but it is not as bright as it use to be. Anyone have any recommendations on how to make it "shine" again?