How do you wash freeform/neglect dreadlocks?

When I wash my hair, I rub my hair all over and my scalp (like everyone does) , but now that I have started neglect-freeforming dreadlocks I don’t know whether there’s a better way to wash them to avoid unknotting any knots that may have formed. 

My hair is very curly, 3C hair, so can knot up very quickly when left to its own devices, but can also equally as quickly unknot itself when having a shower.

Also, I have another question - is itchy hair normal when neglect-freeforming dreadlocks? I’ve never had itchy hair in 23 years, and now that I have started to neglect-freeform dreadlocks my hair is insanely itchy even though I am washing my hair as frequently as I have done for years.

Thanks. Peace.

--
Fear leads to anger, anger leads to hate, hate leads to suffering.

Choose love over hate.

World peace is possible, give peace a chance.
updated by @aquaguy: 05/09/18 03:48:50PM

just get the scalp clean get your fingers in there scrape the scalp clean then rinse through tfe hair..towel drying unknots a lot too

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My new book Ban The Taboo Vol 1

rinsing with cold water is good against itchy scalp, wash at least once a week!

Try rubbing some grape seed oil on your scalp every morning, it might help with the itching, like it did for me.

i should get some

--
My new book Ban The Taboo Vol 1