On my Glock 26, after initial disassembly for cleaning (I always clean a new gun and apply lubrication at the designated areas) the slide would not go back on. I played with it trying to figure out why. Apparently the trigger bar is hitting the firing pin safety and not letting the slide go back on all the way. It is only when I press the firing pin safety in manually with a small wooden dowel (up through the magazine well) will it go on. The firing pin safety looks fine, so Im assuming maybe the trigger bar area that contacts the firing pin safety was machined wrong? I put some grease on the trigger bar, and now it goes on without the wooden dowel treatment about 50% of the time. Do you recommend that I polish the trigger bar (I dont want to mess anything up) or just see about replacing it? Thanks!