I have several Janome machines and their threaders are priceless to me. I think it is just a matter of having everything in the right place at the right time. That means having the thread take-up lever at its highest point, laying the thread across the threader and then allowing the threader to do it's work. Sometimes practice helps along with getting the threader broke in to being used. Not all threaders are created equal, but all my Janome's have great threaders.