DS2 has been scratching his head for a few days. As his hair is very short and fair, it's easy to search through in the manner of a family of chimpanzees (but without the eating). I've found nothing louse like but have seen what could be eggs. Nits are, inevitably, doing the rounds in his class so I assume he has them - or has had them at some point seeing as I can't find any actual nits and assume the eggs don't itch.
What non -chemical treatments can I use? I've been coating his and DS1's hair in tea tree oil and also stacks of conditioner at every opportunity. I don't have the time or energy for a dedicated few weeks of combing though!