Daughter got head lice. Lindane only killed bugs, not nits. Do any natural remedies work?

Vinegar assist. Local application of a stout vinegar will sometimes loosen the bond the nit has to the hair, making it easier to remove. Pickling vinegar or apple cider vinegar seem to work well.You will still need the nit comb or tweezers, but a liberal application of this can help.
What natural remedy? Lindane usually kills and eggs of head lice, however, lindane resistance has been reported. Malathion treatment is indicated for lindane resistant cases.