What did they say they used it on?
couple of problems
They use it on any plant with aphids, white fly, etc. It's a miracle for those who try it - or so they say. We tried making our own: without wax it didn't stick.
hmmmmmm - sounds interesting!
You do have to spray both sides of the leaves, stems, etc. - wherever the critters are. I want to try it this spring on my Hollyhock to try and ward off rust but it may not be the right answer.