We recommend just leaving the pearl of Gellie on the wand and keeping it close by at all times! Most people store the wand Gellie end up in a cup with their tools by their work table. It won’t get hard or stringy or turn bad from being exposed to the air. But if you want to take it off and store it in the box that’s fine, too.
When it becomes too dirty to pick up well, toss it and replace it with another small piece.