I don't wear kinky twists but I do wear braids. I assume the "dirt knot" is the same one that can be gotten from wearing braids. I never get them and I assume it's because I never apply conditioner to the bottom inch of my braids; I don't use anything on my scalp or on my braids, and if I had to spay something on my braids, I'd avoid the bottom inch close to the starting point of the braids; I redo my braids as soon as possible, not undoing the lot but taking out one at a time, finger-combing and then rebraiding. Since I don't use products in my hair, I never clarify...so I dunno if that's something that might help. Kinky twist wearers might be better at advising you on that.