To get rid of dirty lines or stains that refuse to shine, you can follow these cleaning tips depending on the type of surface:

1. For Tiles (Bathroom/Kitchen):

• Vinegar and Baking Soda: Mix equal parts vinegar and water, and spray on the stained area. Let it sit for a few minutes, then scrub with a brush dipped in baking soda.
• Hydrogen Peroxide: For stubborn stains on grout, use hydrogen peroxide directly or mix it with baking soda for extra strength. Scrub gently with a toothbrush.

2. For Stainless Steel:

• White Vinegar: Spray white vinegar onto the surface and wipe it down with a microfiber cloth. It removes grime and streaks.
• Olive Oil or Baby Oil: Apply a small amount of olive oil to a cloth and buff the surface for shine.

3. For Glass or Windows:

• Dish Soap and Water: Use a mixture of warm water and dish soap, wiping with a soft cloth.
• Newspaper: After cleaning, use crumpled newspaper to dry and polish the surface for a streak-free shine.

4. For Wooden Surfaces:

• Mild Soap and Water: Clean wooden surfaces with a damp cloth using a mild detergent, then dry with a soft cloth.
• Polish: Use wood polish or lemon oil to restore shine.

5. For Leather or Upholstery:

• Vinegar and Water Mix: Clean with a vinegar-water solution and wipe with a damp cloth, then condition the leather to restore its shine.

Always test a small area before applying cleaning solutions to ensure they don’t damage the material.