To use the glass vial opener safely, hold the vial firmly in one hand and the opener in the other hand with the pointed tip aligned with the groove or notch on the vial's cap. Apply gentle downward pressure on the opener away from the blue dot while keeping it firmly inserted in the groove to push the cap away and remove it cleanly. Safely discard the cap and proceed with necessary steps for using the contents of the vial. Exercise caution to prevent injury or breakage and seek assistance from a healthcare professional if encountering difficulties or signs of damage.