Hi Amy,
I got the dead sea shampoo a few weeks back as a result of my P spreading to behind one of my ears. I only used it a few times because it left my hair not feeling very clean. It smelt very strong, which i actually quite liked, and the flakes on my scalp didnt feel as easily pick-able, but i gave up after then as my hair just felt grim. I think i will give it another go though, and if i could use a normal shampoo afterwards (not sure if this would have an detrimental effect?) then i would deffo be happier!
Hope this helps! xx