Use your right index finger placed on the Groove above the lip part left index finger placed just to the left of the Groove lips, then gently to coat with the right index finger, and then switch sides to do the same.
Use the right index finger is placed on the groove above the lip. The left index finger placed on the left of cleft lips and rub gently into the right index finger. Then switch sides do the same
Use the index finger right on the groove above the lips. The left index finger on the left side of the groove lips. Then smear gently into the right index finger, then switch sides to do the same.