Some shampoos can be really bad for dreads because they leave residue behind on the hair, which can lubricate the hairs and cause the knots to fall apart. Residue is not a problem for normal hair because normal hair is straight and free flowing, whereas dreads and braids are a little harder to rinse well because they hold residues much easier because of the way it is tightly packed together. The residues can also cause itching and irritation on the scalp because they build up and the scalp cannot breath.
Conditioner will always lubricate the hairs and loosen the dreads, because that’s what it’s supposed to do.
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