Does just thinking of lice make you start scratching your head? It sure does me!
Luckily, our family has never had lice, but I completely agree with Ben Franklin that an ounce of prevention is worth a pound of cure... and in the case of lice maybe two pounds. After several boys in my son's baseball team all had lice, from sharing helmets, I began doggedly searching for natural repellents. A friend of mine told me she read that lice, like many other bugs, do not like the fragrance of rosemary. She said that as a preventive measure, she keeps a few fresh twigs inside her daughter's pillowcases. I have a HUGE rosemary plant, in Texas they are so easy to grow, and require little care, the worst thing you can do is over water them!! Inspired by my friend's idea, I began placing the fresh twigs inside my children's shampoo and conditioner. After about an hour, the smell is infused throughout the entire bottle. I just leave it in the bottle. My kid's hair smells great; it's a clean, fresh scent. I can't promise that this is 100% reliable, but we have never had any lice to prove otherwise! However, I still scratch my head just thinking about it!
I did some googlin', and found a few companies that sell rosemary shampoo and sprays as a natural lice deterrent. Just a FYI. http://www.fairytaleshaircare.com/
