In the case of mature locks, you need to focus on the root of your dread. (Chances are that nothing you do to the actual dreads themselves will stick.) It'll leave you with a bit of a forked lock until it grows out, but it'll mean a new larger lock growing in. Newer locks can be partially undone and backcombed together for a more uniform look.

Take the roots of both dreads and bind them (we recommend using embroidery floss or yarn instead of elastics. Elastics will break down into a nasty goo if left in your hair. Gross!) Try to get them as tight to the scalp as possible. Add a good root rubbing to your maintenance routine, and remember to palmroll the two dreads as one.