Add 25 drops of rosemary, 25 drops of eucalyptus and 25 drops of lavender oil into 75 ml of plant oil (olive, sunflower, etc.). Keep the mixture in a dark glass bottle. Apply on moist hair (otherwise it will be difficult to wash it out) and massage into roots and scalp. Focus on the areas around ears and neck, since these are the areas, where lice proliferate most. Keep the mixture on for at least 1 hour and then wash the hair with a shampoo. Use fine-tooth comb to get rid of the nits (lice eggs). Repeat the procedure at least two times (every three days), until you’re sure that the hair is completely clean.