You can also use apple cider vinegar and it should kill them also.
Be sure to clean the sheets and pillow cases well!!!
Mix apple cider vinegar, Coconut oil, essential oils and baking powder and salt in a bottle and then spray it on the bed and pillows and anywhere else you feel needs to be treated.
If they have stuff animals stick them in pillow cases and wash them and then stick them in trash bags in the closet for a while. You can also spray them before you wash them.
For combs and brushes, clean out the old hair from them and then you can spray them down and soak them in the sink with shampoo.
They always say that black people cannot get lice and that is not true!They can. but what I found out is useful whenever I was a kid and I would go over to my cousins and they would have lice is that the royal crown hair dressing kills them instantly and it makes the hair look nice!!