Treatment for hard spots

I definitly rinse everything well, usually try to bunch up the ends so they get a little more water too (5-10 minutes sounds about right). To make sure all the shampoo is out i do a hand scrub check over my scalp and dreads for any left over suds.

Ok, very good! Then there should be nothing to worry about. If it would be any sort of residue buildup, it would be smelly when wet.

The picture you have posted seems very similar to some of my dread tips. The hard spots might get softer over time.

Thank you that eases a lot of anxiety.