I've never used one of those, but it looks like a top coil(?) Anyway, little tiny pieces of mass-produced plastic aren't known for their quality, so a high failure rate should be anticipated (if it doesn't happen, yipeee!). For similar clearos, in my experience they tend to perform better if they aren't filled up higher than just below the tops of the wicks. It seems like any more and
juice gets into the center tube anyway. If they are leaking from the bottom, try rolling up a piece of paper towel and sliding it inside. I do it until the paper comes out dry. If it's taking awhile, I may just let it sit with the paper in it for a few minites.
This is with a carto, but you get the idea: