How to Use Lash Growth Serum: For best results, apply lash growth serum twice daily to the base of your upper lash line using the applicator brush provided - first thing in the morning and allow to absorb before applying makeup and at night after cleansing face, before bed. Ensure any makeup is removed and your lashes are dry before applying. Blot out any excess solution and avoid getting the product into your eyes. Do not ingest.