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Most shampoos and conditioners leave behind some type of residue on your hair, which may cause it to become dull, greasy or laden with heavy byproducts. Most hair types are able to retain their desired style and texture in spite of shampoo residue, but if you have or plan to have dreadlocks, shampoo with residue can seriously compromise the look you are trying to achieve. According to PerfectDreadlocks.com, dreadlocks tend to hold onto residue more tightly because of the way the hair is packed together. The lubrication of residue can cause the dreadlock knots to come unraveled, and may also lead to itchy and irritated scalp because of buildup. Dreadlock wearers, as well as those simply seeking a cleaner wash, may benefit from residue-free shampoo.

Dreadhead Dread Soap

Dread Soap is a residue-free shampoo that is part of the Dreadhead line of hair care products for dreadlocks. The company says this product is an all-natural soap product that features cocoa nut surfactants, which are designed to clean hair without leaving any product behind. It is fragrance-free and said to not leave a scent. Its ingredients are vegan, and it also is designed to speed up the dreadlock "locking" process, the company notes.

Neutrogena Anti-Residue Shampoo

This residue-free shampoo is also meant to neutralize the effects left by the residue of other shampoos and conditioners. According to Neutrogena, this product, which is intended for all hair types, should be used once a week in order to rinse away any existing residue. The company reports that this product can wash away about 95 percent of residue left behind by other products. The product is described as non-irritating and clean rinsing.

Unilocs Residue Free Shampoo

Another product specifically designed for use with dreadlocks, Unilocs Residue Free Shampoo is made by Chatto, a natural and organic hair and skincare company. According to Chatto, Unilocs Residue Free Shampoo provides a clean wash while strengthening and nourishing your hair. It is said to repair split ends and generate growth in areas that are broken or damaged. The product contains a blend of essential oils and various other natural ingredients, the company says.