So glad the needle threader works again for you! The first time that happened to me I was mad at myself because I thought I had broken the threader. I kept looking at how that threader works & saw a tiny wire like looking thing that actually slips through the eye of the needle & realized that it wasn't lined up exactly with the eye of the needle. At first I thought my needle had come loose & had dropped down a bit so I took my needle out & pushed it up as far as it would go & tightened the needle screw. Still, that did not work. I finally discovered the needle was not positioned in the complete "up" position so I did like you....pushed the up/down button & low & behold it worked. Turning your machine off & then back on again should reposition the needle also.