Not getting all the shampoo/conditioner rinsed out will damage your hair and lead to build up that can damage your scalp. The buildup blocks your pores which makes it difficult for your hair to grow and also can lead to zits on your scalp!

You need to work the shampoo/conditioner throughout your hair and rinse it in a similar way. Also make sure you are using good shampoo/conditioner and not one that is filled with wax fillers.