Onlyme - my children's school's very good at overcoming outbreaks of nits, and tell parents that if they find them on their children, to keep them at home until their heads are clear, and to alert the teacher. The cycle of a nit can last for 14 days. As ummmm and julie said, if you're going to condition the hair, it needs to be done every day. The white balls you see in your daughter's hair are the spent egg cases - so unfortunately, there are perhaps a good few to get rid of. Nits can be hard to detect as they cling to strands of hair. Change pillow cases very regularly, use a good nit shampoo, and treat the rest of the family as well. The problem should clear up, but if her friends also have them, it's going to be a problem unless you have a word with their parents and they do the same thing. x