Remove dust and light dirt by using a soft brush or a dry cloth.

Prepare a cleaning solution by mixing warm water with a glass or mirror cleaning powder. You can also use a natural alternative by mixing equal parts of water and vinegar.

Spray the cleaning solution onto the surface of the window or mirror using a spray bottle or a clean cloth.

Use a soft and clean cloth, such as a cotton cloth or old newspapers, to wipe the surface in straight motions. It is preferable to use horizontal or vertical strokes for better results.

In case of stubborn stains, you can use a glass scraper or a specialized window and mirror cleaning tool to remove them. Gently rub the stains until they are gone.

Use a dry and clean cloth to wipe the surface and remove any residue of the cleaning solution or moisture.

To achieve a shiny and streak-free finish, you can use a slightly dampened soft cloth with a little clean water to gently clean the windows and mirrors, and then wipe them with a dry cloth.