While washing to prepare for immersion,hafifah, the body and hair should be checked thoroughly for dirt and intervening substances and the hair untangled.
Excerpt from Family Purity by Rabbi F. Jacobs, reprinted with permission.
All that is sacred to the nation of the G-d of Avraham and is fundamental to the house of Israel - in establishing and rearing an upright generation, kashrut of food, the sublime pure holiness of Shabbat, was entrusted by awesome and revered G-d - for preservation and development - to the woman of Israel.
The woman who fulfills her obligation and destiny in the life of the family, in conducting the home, and in seeing that the education be according to Torah, this woman is the subject of the verse, "The wisdom of women constructed her home."
Hayom Yom, 26 Adar 2, written by the Lubavitcher Rebbe