updated by @kaleb-hyden: 01/13/15 09:57:49PM
The first time you rub your hair like that, you'll create a few tangles. But the next time you do it, you undo all of those tangles and knots. It's not worth it.
When you scrub just your scalp, the soap rinses through your hair as you rinse it out. That's all you need for the most part. You only ever need to scrub your locks if you get the super dirty or have product in them. The only product you don't have scrub out is the gel from dreadlockshmapoo.com. It is completely water soluble and breaks down within a few days. In water it completely washes away