I must be lucky. I've never had problems with mine. Each brand has goods and bads. I've found the cheaper the serger, the harder to thread (this is especially true for older sergers). Advice without knowing what your machine is and your specific issue (you might get the needles right but the loopers wrong kind of thing) isn't really helpful. I suggest that you find someone that knows how to thread it, use different colors for each path, then follow the path. Photograph it, draw it out, whatever works for you and write you own personal directions that makes sense to YOU. I can guarantee that any manual I write makes sense to me, but half my readers will be scratching their head going, HUH?