Your suggestions for treating hair lice keep coming in by the bucket load - in fact, we're thinking of doing a book. Of Lice and Men, perhaps?
A naturopath recommends Delacet, a formula that kills the lice and their eggs. It has to stay on the head for three hours each session. Delacet is distributed by Healthpol at 62 Hoodcote Gardens, London N21 2NE.
One concoction, based on research that appeared in the International Journal of Aromatherapy, is made up of jojoba or castor oil, with a 2% mix of eucalyptus, geranium, rosemary and thyme. Cover the hair with a shower cap after the oil has been applied, and leave on for at least an hour, or overnight if possible. Wash and condition, and leave the conditioner in until you have combed out the hair with a nit comb. As a preventative, you can mix one of the oils with a shampoo and conditioner.