T.,
I know exactly how you feel!! My now 6 yr old had head lice when she was in preschool for almost 10 months, everyone in the house got it once and everyone and everything was treated but she kept getting it. We tried everything, mayo in the hair for hours, this is supposed to smother them, over the counter treatments, prescription treatments and she would still get it. We even cut her hair short to see if this would help. We were told to use shampoo with rosemary in it, they dont like the rosemary, keep their hair in braids and use hair spray, we did all of this and my daughter still got it. This is going to sound crazy I am sure but this is what we found work and knock on wood we have not delt with it in a year, I pulled her hair in a pony tail except I left down in the back the section that is the underneath, from like just above the bottom of the ear to the the base of her neck and I shaved this section as close as I could. The second time she got it from someone in her kindergarten class I actually shaved alittle more just be be safe, I ran my fingers from the top of her ear around to the back of her head, I pulled all of this up and shaved the bottom. Belive it or not it worked and has been completely successful, knock on wood. I had a hair dresser tell me it worked because most of the time the eggs are in the bootm of the hair line because it is thick and warm and when the hair is wet it takes the longest time to dry. IF this had you completely confused as to what I shaved, I dont know if you were in high school when it was popular for the girls basketball team to shave the back of their head for when they played a game and pulled their hair into pony tail they did not have to worry about hair being to short to stay in, well if you were this is what I shaved, I think they also shaved their numbers in the area as well! I hope this helps it is so frustrating and can get very expensive to treat and retreat! I also had my ped. tell me to freexe the bug out of your house.... one a cool/cold day open all of your windows and air out your house, I am not sure if this worked or not but it may be worth a try!