Excessive touching or rubbing of your eyes/brows will cause premature shedding of your natural lashes/brows and/or extensions as your fingertips contain oil. Wipe your lids and lashes with water after working out or excessive sweating. If you have oily skin, use blotting paper and wear powder, talc, or eyeshadow on your lid to absorb oils. Dab brow area and surrounding skin gently with a sponge and water after working out or excessive sweating. Do not use circular motions. Sweat contains oil.