Nip & Fab Glycolic Fix Facial Scrub Concentrated 6% Peel. Everything you love about Nip & Fab Glycolic Fix Facial Scrub, the original facial scrub but in a very concentrated form. We've doubled the amount of glycolic acid to 6%, which means smoother, brighter and clearer skin after just one use. It exfoliates pores thanks to it containing 1% salicylic acid, expels blackheads that cause dead skin, oils and dirt.