Slow And Steady Wins The Race
It takes a while to get in to the groove of head lice and nit picking. Be patient. Keep going until you find what works for you.
And I'm not talking about which "shampoo" works for you. I mean find the right place to sit. Find the right lighting. Get the right comb. Get the support of a friend. Make the lice check fit easily into your family's schedule.
The fight against head lice is not a sprint, it's a marathon, so don't waste your energy by panicking or taking extreme measures. The bugs can only lay 3-10 eggs per day, and those eggs will take about a week to hatch. Yes, it's a problem but it became a problem over weeks, and it may take you weeks to completely get rid of them. But you can do it, if you deal with it a bit every day. You can always pick and comb faster than they can lay the eggs. Don't panic - you can always outrun them. Just keep going.