It may help to cut your granddaughter's hair a bit shorter to make it easier to see the eggs and nits. You may also have to apply an oily conditioner and use a pair of fine tweezers to gently pull off eggs and nits. Be very gentle and don't pull hard! The oily conditioner should make it easier to pull off the nits and eggs. To get a better view, try using a good, direct light and a magnifying glass. Also, you may want to talk to a local hairdresser and see if they have any suggestions for even finer combs.