To remove hard water stains on granite, you will need the following materials:

- Baking soda

- White vinegar

- Soft cloth

- Water

- Spray bottle

Instructions:

1. Mix a paste of baking soda and water. The paste should be thick enough to spread easily but not runny.

2. Apply the paste to the hard water stains on the granite.

3. Let the paste sit for at least 30 minutes.

4. After 30 minutes, dampen the soft cloth with water and wipe away the paste.

5. If the stains are still visible, repeat steps 2 through 4.

6. Once the stains are removed, rinse the area with water and dry it with a clean cloth.

Tips:

- Test the cleaning solution on a small, inconspicuous area of the granite before applying it to the entire surface.

- Avoid using harsh cleaners or abrasives, as these can damage the granite.

- If the hard water stains are particularly stubborn, you may need to hire a professional cleaning service.