Needle threader

I've used 0,25 mm Kynar electrical wire.Must be printed at 0,1 mm layer height to preserve wire channel size.Set a pause at 1,80 mm layer.Make a 0,8 mm loop at both ends of the wire. Wrapping once or twice around small tweezers should be enough.Put the wire during the pause with the ends inside the hole. Make sure it doesn't protrude the sides of the hole.Resume the print and the wire will be closed inside.