Replace your mascara often. It can be a breeding ground for bacteria and cause infection. Don’t pump the brush in and out of the tube, the trapped air will dry the mascara out. Before your mascara is completely dry, comb the lashes through with a clean wand after you have applied the mascara to remove clumps. If your mascara smudges onto your eyelid or cheek, remove it with a cotton swab to disturb as little of your makeup as possible. – T