It’s important to use NYDA on dry hair.
- Spray the hair roots thoroughly with NYDA. Use enough NYDA to completely cover the hair when you massage it in.
- Massage in and allow it to work for 30 minutes.
- After 30 minutes, carefully comb through the hair with the lice comb to remove the dead lice, nymphs and detached eggs.
- Allow NYDA to dry on the hair and act overnight (at least 8 hours) to ensure all the eggs have been eradicated. In the morning, wash the hair with your usual shampoo. Repeat shampooing if necessary.