A friend just told me about this and I gave it a try. It doesn't kill them, but at least it makes them let go of the plant. Submerge an infested plant in a bucket of water, (I was told a minute or two, but it took a little longer for me) and you will find the little critters floating and/or sinking, but no longer on the plant. I used a strainer to scoop them out of the bucket. ¡Adios mis amigos! I was so pleased I had to go out and buy a bottle of wine to celebrate.