I have heard that a mixture of tea tree oil, eucalyptus and olive oil slathered into the hair, left for a while (as long as they can stand it) and then combed through then washed works. Haven't tried this one as I've mostly done the conditioner method with DD but school went back today so won't be long before the little pests are back!

Also make sure you wash the pillowcase then either let dry in the sun or put into the dryer as high temp as it goes. And clean the brushes too.