Hair washing is the cosmetic act of keeping hair clean by washing it with shampoo or other detergent products and water. Hair conditioner may also be used to improve hair's texture and manageability.
Two-in-one shampoos, which have both detergent and conditioning components, are now commonly also used as a replacement for shampoo and conditioner.
To remove the sebum from the hair, some people apply a surfactant, most usually shampoo, but sometimes soap to their hair and lather the surfactant with water. The surfactant is rinsed out with water along with the freed dirt and dust it bonds to.
There are also dry shampoos, which are powders which remove sebum from the hair by soaking it up prior to being combed out.