Honestly, my Dewey never worked for me - only a handful of cuts ever grew roots. For the past couple months, I've just been rooting them in soil. I cut 'em and toss 'em into a cup of water for a couple days, and then dust 'em with rooting powder and stick 'em in a cup of soil. I keep the middle wet, dribbling some water over it every couple days, and about 2 weeks later they're growing new green foliage.
The Dewey was really only useful for keeping cuts. I could hold them for weeks. And I haven't had trouble with the water, so ... dunno about keeping crud out..
The Dewey was really only useful for keeping cuts. I could hold them for weeks. And I haven't had trouble with the water, so ... dunno about keeping crud out..