G.B.
I always refer moms to headlice.org. I think it has the best advice for any mom who knows what it's like. I too dread finding it again but we don't do all the old wives tales anymore that so many moms do. I got the facts and it was much easier than many people told me.
We never used the shampoos, we used regular shampoo and conditioner, we did section off the kids hair into about 200 ponytails and go through each one while looking through a huge lighted magnifying glass and got every bug and nit the first time through. We kept going through and looking at least once a day and never found another nit or bug.
Many people swear that by putting 1-2 drops of tea tree oil in their shampoo bottles that they never have lice again. It really stinks and is very oily so I think it might work.
Lice only like clean people, they can't stick their nits on dirty hair.