My own natural dreads progress
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what i noticed is that the dreading kinda goes in fases. Nothing rly happens for some time (maybe some time of existing knots), and then suddenly after washing you have a few new dreads. I dont really think more washing would speed up this progress. The way i see it, ur hair has to kinda "build up" a baseline of knottyness, and only then will you get dreads. This obviously happens in different speeds in different areas. It's probably not how it goes for everyone, but this is how it went for me, so if it goes this way for you aswell, washing probably wont help.