I have hay fever and when it's birch pollen season I have a whole raft of extra reactions. This year I had a huge and itchy rash reaction to either my shampoo or my conditioner. As a result I didn't wash my hair for about three weeks, just rinsed with water, and the condition of it improved dramatically. Since then I've only used shampoo on it once because I have grey hair and I have a shampoo that makes is more silver. It irritated my scalp a bit and made my hair dry and dull so I would rather use a silver/purple conditioner every few weeks instead.
Any recommendations? The purple shampoo that I currently use is Blue Malva by Aveda. I could just use the Blue Malva conditioner, but there might be something better out there.