How do I get a crisp, consistent line?
Hold the marker perpendicularly, glide the tip gently along the lash line without pressing too hard. The tip is sized to make application easier.

How long does it last / resist wear?
The product is described as having long-lasting hold due to film-forming polymers.

Is it suitable for sensitive eyes / contact lenses?
Yes — it is ophthalmologically tested.

Does it dry quickly?
The description suggests it holds well, so likely quick drying; users should test in practice.

How to store it to maintain performance?
Store with the tip pointing downward to ensure the ink flows properly.