The itch is INCREDIBLE!!! Yes, I have switch around hair products plenty - seldom use shampoo, love borax, soda, have citric in a spray bottle for skin and hair. It has, so far, been unresponsive to all oils, ACV,etc. it crackles and pops under my scalp when I scratch, or sometimes just turning my head, or moving my eyes. I fear it is parasite related - scattered from my early attempts at cleansing, but as I posted in the Iodine forum I had so much happen in a short time several years ago that I cannot figure out a real cause. I want it to stop!!!! Sitting in front of the computer makes it go wild, if that is a clue.