Scientific testing undertaken by the Cawthron Institute And Crop & Food Research established that East Cape ManukaOil is at least 15 times more effective as Australian Tea Tree Oil against gram-positive bacteria (staphylococcus and streptococcus) including antibiotic resistant strains. General Skin Care Problems, Dermatitis, Eczema, Psoriasis - In the morning and evening: apply Manuka Oil to the affected skin. Manuka Oil penetrates into deeper layers of the skin. Repeat oil application 2-3 times throughout the day, as needed. Nail Fungus - Apply Manuka Oil to the affected place. Repeat oil application 2-3 times throughout the day, as needed. Dandruff, Fleas, Lice - Add 30 drops of Manuka Oil to any shampoo and use daily. You can also rub a few drops of Manuka Oil directly into the scalp or use 2 drops of Manuka Oil in your shampoo in hand prior to washing hair.