But while some shampoos include damaging ingredients, conditioner has come a long way since its invention in 1900.

PerHairStory, conditioner was created by Edouard Pinaud, and was originally used to soften facial hair.

But how well does conditioner work as a cleansing agent when it’s used by itself?

Woman washing hair

However, this technique is not for everyone.

For example, fine or oily hair is not a good fit for co-washing, according to Servera.

With all that conditioner, some co-washers were initially concerned about the potential for greasy hair.

Woman washes her hair in the shower

Fortunately, these cleansing conditioners are intended to clean hair and reduce scalp oiliness.

Once things are running smoothly,Mane Addictssuggests co-washing once or twice per week.

For a deeper clean, try shampooing every other week.