Some products for the treatment of head lice are flammable when on the hair, and can ignite and cause serious harm in the presence of an open flame or other source of ignition, such as when lighting cigarettes. The user of these products should keep away from people who are smoking, and open flames or other sources of ignition, including in the morning after an overnight application, until the hair is washed. In our Conditioning Defence Spray, we start with our trusted Vosene Kids formula and add a strong boost of citronella oil to give your little ones shiny, tangle free hair that will help keep head lice at bay. Our multi-award winning* defence spray is clinically proven to help keep head lice at bay while conditioning and detangling hair. It contains 100% natural head lice repellent actives, including citronella oil. The scent is purposefully enhanced for strong efficacy. okay so it does what its say when used in conjunction with the shampoo/condioner to prptect against nits.