When I used my latest purchase of Ionil T, my scalp begn itching instantly. That led me to look at the bottle. It no longer says, although it used to, 'non-ionic' and the ingredients list includes laureth-4 and laureth-23. They weren't there originally and I doubt they were in the last batch I bought. (I but several at a time because Ionil T can be hard to find.) It is possible to find the old formulation anywhere? Might the manufacturer be convinced to make it again, as a specialty item, perhaps? Has anyone else noticed the difference? Does anyone know of a coal tar shampoo _without_ ingredients that start with 'laur' or sulfates?