Originally, I kept buying those lice kits and they are expensive. There is nothing wrong with those and it's great to use to kill the bugs already hatched and crawling around. However, you HAVE to get the eggs. Every single one of them and you can only do that with a lice comb.
Wash your child's hair and then condition really good. Don't rinse the conditioner out because this is gonna help get the eggs out when combing through. The picture of the girl shows her hair dry but when I'm doing it, it's wet with conditioner on it.
The first night only I bought a spray for only $5 that kills bugs on the bed or any other non-washable item. After it dried I vacuumed the beds. Each night before they go to bed I would throw all their bedding and pillows into the dryer for 20 minutes on high heat. After they wake up I do it again. The reason is throughout the day they they go to their bed sometimes to rest or just play and if they do have any bugs, it can get back on the bedding. Then repeat that night drying the bedding on high heat before they lay on it. It kills the bugs. I also dried all of their stuffed animals they slept with at night.
Don't worry about washing every single item of clothing in your house. Lice can't live without human blood for more than 2 or 3 days. I only worried about washing things they would come in close contact with.
I've kept my kids out of church for obvious reasons of not passing it around and it's soooo not nice to send kids to school until they are totally clear. I hope this helps and please leave me a comment any time if you have any questions!