I have a child in my home with head lice. I treated it twice with over the counter medication and it did not go away so I brought her in and treated her and everyone in the home with permethrin two days ago and colmbed out the hair in small sections to make sure I got rid of all nits and eggs as well, but one child has live lice again. I have also bagged up all the pillows in the house and washed all clothing and blankets with hot bleach water. I also bought nix spray and sprayed all the furniture, beds, and carpets throughout the house. Is there anything else I can do to permanently remove this lice infestation from my home?