Yes, a clay bar can be effective in removing water spots from glass. Water spots are typically caused by the minerals left behind when water evaporates on the surface.

These spots can be particularly stubborn on glass and may not come off with regular washing.

How to Use a Clay Bar on Glass to Remove Water Spots:

1. Clean the Glass: Before using a clay bar, make sure the glass is thoroughly cleaned to remove any dirt or debris that could scratch the surface during the claying process.

2. Lubricate: Generously apply a clay lubricant to the glass. This is crucial as it helps the clay bar glide smoothly over the surface without scratching.

3. Clay the Glass: Gently glide the clay bar over the lubricated glass surface. Move it back and forth in straight lines, not in circles. You’ll feel resistance at first, which will decrease as the contaminants are lifted off.

4. Wipe Clean: After you’ve gone over the area with the clay bar, use a clean microfiber towel to wipe off any lubricant and lifted residues. Check the results and repeat if necessary until the water spots are gone.

5. Inspect and Touch Up: Once the glass is dry, inspect for any remaining spots. Sometimes, stubborn water spots might require another pass with the clay bar or a glass polish for complete removal.

6. Protect the Glass: After cleaning, consider applying a glass sealant or hydrophobic coating. These products can help prevent future water spots by causing water to bead up and roll off more easily.

Tips for Effective Claying on Glass:

• Be Gentle: Applying too much pressure can scratch the glass. Let the clay do the work.
• Keep the Area Well-Lubricated: This minimizes the risk of scratches and ensures that the clay bar can move smoothly across the surface.
• Use a Fine-Grade Clay Bar: Fine-grade clay bars are less abrasive and safer for use on sensitive surfaces like glass.
• Regular Maintenance: Regularly cleaning and treating your glass can prevent the buildup of water spots and other contaminants.

Using a clay bar on glass is a safe and effective method to remove water spots, especially when they do not respond to regular cleaning methods. This can help restore clear visibility and improve the appearance of your vehicle.