Use a commercial anti-fog spray

Spray a purpose-made anti-fog product onto your clean mirror, then buff it dry. These sprays deposit a hydrophilic coating that prevents moisture from forming visible droplets, keeping the mirror clear through multiple showers.

Steps

1. Clean the mirror with glass cleaner and let it dry completely.
2. Spray the anti-fog product lightly and evenly across the surface.
3. Buff gently with a clean, dry cloth per the product directions.
4. Reapply according to the manufacturer's schedule, typically every 1-2 weeks.

Why It Works

Anti-fog sprays use surfactant or polymer-based formulas that create a hydrophilic layer on glass. Water condenses as a flat, transparent film instead of light-scattering droplets.

Tips

• Popular options include Rain-X Anti-Fog and Optix 55.
• Results typically last longer than DIY soap methods -- often 1-2 weeks per application.
• Avoid spraying on already-fogged mirrors; always start with a clean, dry surface.