Merely hearing the words "Super Lice" is enough to give parents nightmares.
New US research published in the Journal of Economic Entomology has found that 98 per cent of lice have become resistant, to over-the-counter remedies.
So, is it time to ditch the chemicals and the comb?
Dr Cameron Webb is from the Department of Medical Entomology, from the University of Sydney.
He talks to Jesse Mulligan about how "Super Lice" can be stopped in their tracks.