In UK all we are doing now is to wash hair, put conditioner on and then comb out. This will stop the live lice from clinging to the hair and they can be removed. Repeat every 2 days so that when the eggs hatch and the lice appear you are removing them. You can try rinsing the hair with diluted lavender oli as this is supposed to be a preventative.

You can also by Nit Nurse from Helios or Ainsworth which is a mixture of various aromatherapy oils.