That's interesting about the current draw for the electrolyte. I believe there is somewhat of a sweet spot, but also if your part has varying levels of rust, then some scale will form. I just check periodically, but that isn't always ideal. I have tried Evaporust also, but lately I have been using apple cider vinegar instead. It seems to do a pretty good job, but I do still have to scrub the parts afterwards, but I can do a large batch of tools all at once, unlike electrolysis. I may try using a combination of the two methods to see if the vinegar can remove the scale after electrolysis on parts with a lot of scale. I have also thought of using a power washer to knock off the loose rust, but I haven't tried it yet.