I've been messing on and off with the idea for a decade or more, using rope of various constructions, and woven cotton window-sash seemed closest to getting it running.
To answer some of the questions, It will climb, through capillary action up the wick, and then run down....contaminants get trapped.
My best working set-up was in an old tin clothes locker, with an old pulley hung from the roof, and a really long drop to the receiving bottle.
Next trial will be 2 20L drums, 1 atop the other. Bottom cut out of the top drum, half of the top cut out of the bottom, making a ledge for the used delvac 1 to sit, while it runs through the rope to become delvac 2...
Or I just run o to the other through a TP filter.