I've been using silicone and sulphate free shampoo and conditioner for around 3 or 4 weeks now. My hair feels dryer, which I did kind-of expect with the loss of coating and product build up, but now when I use hair straighteners, even on a low heat setting, the section of hair I've just straightened (or attempted to curl) hardens into a solid section, which I then have to brush out.
Do I just need to stick it out? Does it take a while for the condition to improve? I wash my hair around 3 or 4 times a week.