We use the Eco.kids range and the metal comb/conditioner combination.
We use the Eco.kids shampoo at night and then comb with a metal
lice comb after lathering with cheap conditioner (this is preventative not to treat).
Then before school I spray with Eco.kids leave in conditioner and I style DS's hair with their styling cement. And yes, we do this every school day and when he has contact with other kids (excessive, I know
) BUT we have not had nits in 2 years since we started following this routine (despite his class being riddled with them).
They also make a Lice 'bomb' which I haven't used (there hasn't been a need)