You can follow these steps:

1. Clear the area: Remove any objects or furniture from your balcony that might get in the way or obstruct your cleaning.
2. Dust the glass: Use a soft-bristled brush or a dry microfiber cloth to remove any dust or debris from the glass surface.
3. Apply cleaning solution: Mix a solution of warm water and a small amount of dish soap or a specialized glass cleaner. Apply the solution generously to the glass surface.
4. Scrub the glass: Use a soft-bristled brush or a sponge to gently scrub the glass in a circular motion, starting from the top and working your way down.
5. Rinse the glass: Use a bucket of clean water or a hose to rinse the glass surface thoroughly.
6. Dry the glass: Use a squeegee or a clean microfiber cloth to remove any remaining water from the glass surface. Start from the top and work your way down, making sure to dry the edges and corners thoroughly.
7. Finish up: If you notice any streaks or spots, use a clean, dry cloth to buff the glass until it’s completely clear.

It’s important to note that you should avoid cleaning balcony glass in direct sunlight or when it’s hot, as this can cause the cleaning solution to dry too quickly and leave streaks. Additionally, avoid using abrasive materials, such as steel wool or scrub brushes, on glass, as they can scratch the surface.