Questions for consideration:
Do you have hard water?
What proportions do you mix your BS wash?
Do you use anything else (ie. ACV, essential oils, etc.)?
how are u mixing the bs
are u using acv
how are u rinsing
temp of water
the itch is dryness usualy (if yor using sea salt alot cut way back)
the acgv helps
filtered or boiled water will make the bs dissolve better in hasrd water
making it strong enough to remove the dead skin paste helps
bs will exfoliate removing the dry dead skin turning it into a paste if its not srrong enough or the rinse not powerful enough to remove the paste it stays
all sounds pretty good except possibly the water
and.. the salt u might want to only use every so often 1 outta 4 wadshes maybe rosemary would be good to add teatree maybe reduce when u do
the acv seems strong for young dreads but if its hnot causing problems it would be giood for the scalp..
u could try the dreadlkockshampoo too if this isnt easily fixed
I think you just need to find the right balance. I was doing the BS wash (1/3 cup bs to 1 gal water, 20 drops rosemary and lavender and 15 drops tea tree) and it was doing pretty good. I would follow that with an ACV in that same gallon pitcher with just a splash (what could have been about 1/4 cup?) and the essential oils.
Now, I have really thick hair so instead of just dumping it on, I would lift sections of dreads and aim the spout of the pitcher to the scalp throughout.
This worked and it left me very clean.
Now, on the flip side, I did make a stronger BS wash with 1/2 cup BS and THAT left a white gunky residue... it was just too much.
Either way, I'm experimenting right now. I used Bronners for a month and now I am trying the liquid dreadlocks shampoo for my 2nd month to get an idea of what I like/works best for me. :)
id think your more likely not using enough
I would start with the boiling water thing first with your current proportions and see if, after a while, it clears itself up. Everyone's scalp is different as well as other environmental factors... so experimentation is always a great way to see what works and doesn't. Of course, nothing is going to change overnight so, keep track of progress over a specified length of time and compare results. :)
And seriously, good luck! I have dark hair and a sensitive scalp so I know the challenges with finding something that works.