From the qualitative description of the discharges in the video, it was apparent that the discharges seemed to move upwards, while from the individual images, such a movement was not so clear (some discharges remained in the same vertical position, while others moved slightly upwards). Considering that the vapor layer thickness increases from the bottom of the wire to the electrolyte surface (see above), we determined the vertical distribution of the discharges along the wire, shown in Fig. in the SI. It is apparent that the frequency of discharges is highest around the tip but is similar for all other positions along the wire. The higher number of discharges at the tip is likely due to the high electric fields at this position rather than the thickness of the vapor layer. Based on this result, the apparent upward motion in the video can only be explained by the formation of discharges at the tip, which move upward, where some discharges extinguish slightly above the wire tip. Then, the number of discharges remains constant.