My missionary friend told me of "cuasia"
or the english translation "bitter stick".
Have you ever heard of it? Can we get it here? She says the mothers in Argentina get it at the pharmacy and it looks like mulch.
They fill an empty hairspray bottle half full with the cuasia and fill with alcohol, let set overnight before first use and spray on the hair line. Her kids never got head lice again! She says it stinks like crazy but it definately works. I hope to find a place to get this.