Daughter came home with lice (last day of school) about 3 weeks ago. Have vacummed, steam cleaned, used rid and nix, launder with hot water and high heat in the dryer. Nobody in house seems to have lice anymore, but me. Every time I treat, they seem to come back. I m like a lice magnet. How do I get rid of these pests? I itch so much that I cannot sleep.