Once a month hair wash
In the colonial era, there were more than just biblical roots attached to what was considered a woman’s “crowning glory”. The longer and healthier her hair looked, the better — but as we all know, looks can be deceiving. The better it looked, the dirtier it most likely was.
Their method for keeping it healthy involved washing it only once a month- twice if the hair was excessive oily. This preserved the natural oils in the hair, protecting it from the harsh substance (lye) found in detergents, which made the hair and scalp dry.