I am reading about a lot of people having problems with the E-Z Tack turnouts with derailing or shorting out, and people suggest to file them. How do I file it of it happens, what do I use? I tried to find a youtube video to see but had no luck. I am a visual learner so just trying to figure it out if I have to do it. My trains do make a clicking sound when they go over the turnout but nothing has really derailed yet.