Never had dreadlocks but according to the all mighty google, you do wash/shampoo dreadlocks. www.wikihow.com/Main tain-Dreadlocks Wash your dreadlocks once every 2-4 days. It's important to keep your dreads clean and to remove buildup from your locks. Aim to wash your hair at least 1 time per week, but not every day. It's best to wait at least 2 days between each wash to allow your scalp to produce natural oils.[1] If you have very dry hair that's prone to breakage, talk to your locktician about how often you should be washing your hair according to your hair type.
@tinytim : After you grow it out yes.
