But if your water is hard enough to interfere with good sudsing, it's likely one will help. Besides all the other disadvantages of hard water, many household cleaning tasks are made more difficult and time-consuming when hard water must be used. Over the course of a year, this would save a homemaker more than ten 8-hour work days. The first noticeable effect of hard water is that it impedes proper sudsing for bathing and washing hair. Soap and hardness minerals combine to form a curd that sticks to the body, leaving an unclean, sticky feeling.
More soap is required.
Hair washed in hard water is encrusted with that same curd, which makes hair brittle, hard to keep clean, difficult to manage, and robs it of natural highlights. More shampoo is necessary. Hair washed in softened water is thoroughly clean, smooth, natural looking and easy to manage. Many persons remember collecting rainwater in a barrel to use for washing hair and clothing. There was a reason for it.