So I got a couple of Cold Steel Voyager X2's lately, both new-in-box. They were REALLY smooth out-of-box, and the blades sort of sucked back into the handle incredibly easily when closing them. Took barely ANY wrist movement to flick it open, too. However, just minutes after opening and closing one of them, I realized how it was slowing down and getting more stiff, almost as if it were tightened down too much or something. I tried oiling it with Tuff-Glide, but it actually seemed to make it worse. It's pretty stiff and almost gritty feeling now. I can't take either one of them apart either because they're pinned together rather than screwed. Any ideas?