Re: Head Lice?
Sorry so long - but I've been there too.
It is really important you take a lot of time combing your child's hair. Even if you don't use any of the shampoos or treatments, you need to comb - and comb correctly, with the right kind of comb. We have a special lice comb - not one of the plastic ones that come with the product. It is metal. I've also used an electronic comb I got a local drug store (with iffy results).
I've got two girls - they've had head lice 3 times since pre-school. They are now teens. They've gotten them from classmates (and in one case softball helmets being shared by the girls team. The first time my kids got head lice I was panicked and had to look the little buggers up in a dictionary to see find out if that's what I had.
Over the years, I've had to learn how to deal with them. (and my kids know more about lice than they ever wanted to). It takes a lot of patience and dedication. And just because one person in the family has lice doesn't mean everyone does. Just keep checking yourself and if you find lice - treat.
If you choose to use a lice shampoo, you have to read the label directions carefully and follow them EXACTLY. Same for any retreatment directions. One of the problems with lice resistance is the incorrect use of these shampoos/insecticides.
I can tell you research-based studies have shown again and again, that the focus of any treatments should be the child/adult's hair. If your time is limited, you don't have to constantly be washing laundry or vacuuming.
There is free help from lots of sources. For me, seeing the lice and how to comb was very helpful. There is a free video from the University of Nebraska-Lincoln and you can watch it on-line.
http://lancaster.unl.edu/pest/lice/video.shtml
Good luck!!!