Get yourself a good non residue shampoo, first. The soaps from dreadlockshampoo.com are the best I've found so far.
African textured hair needs more moisture, I'm sure you already know. You can use jojoba oil (It's the closest thing to what your scalp naturally produces) and massage it into your scalp and even massage it into your locks. YOu don't need much. A little goes a long way.
Aloe (from the plant) works great too. Coconut oil is a great conditioner as well
Some people have had a lot of success with live oil. I'd recommend using that as a last resort.