To guarantee effectiveness, it is essential to saturate the entire head of hair. Step 1 : Shake before use. Remove the cap from the applicator. Apply directly to dry hair: 1) Brush the hair to detangle, 2) Place a towel over the child's shoulders and then bring all the hair forward. 3) Saturate the roots with half of the lotion (paying particular attention to the nape of the neck, forehead, and behind the ears). Do not allow the product to drip onto the face. 4) Put the hair in a bun on the top of the head and pour the remaining lotion to cover all of the hair. Step 2 : Massage thoroughly to distribute the lotion evenly. Detangle the hair with a brush and secure it in a bun overnight with an elastic band. Do not rinse the hair until the following morning. 8 hours of application are necessary for a complete effect. Step 3 : The next morning, simply wash the hair with a normal shampoo. Use the provided comb to remove any suffocated nits and lice. The treatment is complete; the child is no longer contagious. No further application is necessary.