Use the Brow Grooming Brush to place eyebrow hair where you want it. If desired, begin by giving structure with an Eye Brow Pencil. Use wet for: Extremely thick brows, more definition and precision - ideal for filling in missing hairs and scars - as well as for the fine line at the end of the brow. Use dry for: A more natural, soft-focus effect. Ideal for well-shaped brows that just need a bit of intensity and do not require filling in.