I'd taken my two to the hairdresser's. DD1's hair was so long and so curly, it had started to form dreadlocks , and no matter how much I brushed it they just kept on forming again. Didn't ask for dd2's hair to be cut (it never has been), but my sister questioned those white specks.
Took them into the pharmacy department in Boots, asked if anyone could identify nits, lady came round and said 'OOOOOOH, yes!!'.
Was about to say nothing worked, but finally cleared both of them with chemicals/nitty gritty comb. Both were a total torment for all of us.
Finally got them clear, when dd1 noticed 2 monsters on dd2. Clearly she hadn't 'bred' these herself, she had been reinfected by someone in her class. It takes a while of getting to know them to realise they're moving across the classroom, rather than just breeding on your child's hair.
Anyhow, at this point I was completely arms up. No way was dd2 going to let me do the wet combing again, or the 'stinky stuff'. So, my thinking was .. if there are these big buggers in there now, and they've obviously moved over from someone else, sooner or later their eggs will hatch. So I meticulously went over her hair with an electric comb, every day, until the nymphs had hatched. I just thought if you managed to catch them before they're sexually active, you might crack it. And it seems to have worked ...