I changed my shampoo a couple of months ago to Kerastase Bain Satin. I use the masque too with it as a conditioner as my hair is dry at the ends and highlighted too.
Recently I have noticed an oily patch on one side of my hair at the top, I wash it everyday but it is still there when I am drying it. Decided I may have build up so have just ordered a clarifying shampoo. Will this fix it? Never used clarifying shampoos before but am assuming (maybe wrongly) that this patch may just be a build up of products.