A negative perception of bar soap is one of the reasons market intelligence agency Mintel cites for declining sales and use.
According to Mintel research, 48 percent of U.S. consumers think bar soap is full of germs after it's used. Sixty percent of 18- to 24-year-olds think that way. Older generations seem to be more accustomed to bar soap, with only 31 percent of people 65 and older saying bars are covered in germs after use.
Bar soap sales dropped 2.2 percent between 2014 and 2015. And the number of households using bar soap dropped from 89 percent to 84 percent between 2010 and 2015.
Mintel also cites in-shower moisturizers as a reason for declining sales.
A beauty analyst with the firm says people who use in-shower moisturizers are less inclined to use moisturizing bar soaps.
"This can result in consumers using more basic, lower-priced bar soap options in order to splurge on in-shower moisturizers," the analyst said.
So how can bar soap companies turn sales around? Mintel says new bars should "incorporate a wider variety of claims, especially for more luxury and premium bar soap offerings."
And they definitely shouldn't lose hope, because between 2010 and 2015, sales for soap, shower and bath products grew 15 percent.