Masque Quintessence

What you are looking at is Masque Quintessence by Leonor Greyl Paris, a haircare product. Build-up is the usual reason a product that worked for months appears to stop working. Work it through damp mid-lengths and ends, keeping oils and masks off the roots unless the label says otherwise. Whether it is discounted this week says more about the shop's stock than about the product. Store it away from steam and direct sun; both shorten the life of the formula. Add delivery to the cheapest price and you will see whether it is genuinely the best deal.