Yes, it is perfectly fine to clay bar a windshield, and it can actually be very beneficial.

Clay barring your windshield can remove contaminants such as tree sap, road grime, water spots, and other debris that regular washing might not remove. This process can improve visibility and help your wipers work more effectively. Here’s how to do it:

Steps to Clay Bar a Windshield

Materials Needed:

• Clay bar or clay mitt
• Clay lubricant (or a mixture of car shampoo and water)
• Microfiber towels
• Glass cleaner (optional, for a final clean)

Steps:

1. Clean the Windshield:

   • Begin by washing the windshield with regular car wash soap and water to remove any loose dirt and debris. This helps prevent scratching during the claying process.
   • Rinse and dry the windshield with a clean microfiber towel.

2. Prepare the Clay Bar:

   • Cut a small piece of clay bar, or use a clay mitt.
   • Knead the clay piece in your hands until it becomes soft and pliable.

3. Lubricate the Windshield:

   • Spray a generous amount of clay lubricant onto a small section of the windshield. Ensure the area is well-lubricated to prevent marring.

4. Use the Clay Bar:

   • Gently glide the clay bar over the lubricated section using straight-line motions (back and forth or up and down). Do not use circular motions.
   • You will feel the clay bar picking up contaminants; it will glide more smoothly as the surface becomes clean.
   • Check the clay bar frequently for contaminants and knead it to expose a clean surface.

5. Wipe Off Residue:

   • After claying each section, wipe it down with a clean microfiber towel to remove any residual lubricant and contaminants.

6. Repeat the Process:

   • Continue the process, section by section, until the entire windshield has been clayed. Ensure each section is well-lubricated before claying to avoid scratches.

7. Final Clean (Optional):

   • For a final clean and to ensure a streak-free finish, you can use a glass cleaner and another clean microfiber towel to wipe down the windshield.

Tips for Success:

• Use Plenty of Lubricant: Ensuring the surface is well-lubricated minimizes the risk of marring or scratching the glass.
• Work in the Shade: To prevent the lubricant from drying too quickly, work in a shaded area.
• Be Gentle: Apply light pressure and let the clay bar do the work.

Benefits of Claying Your Windshield:

• Improved Visibility: Removing contaminants from the windshield enhances clarity and improves visibility.
• Smoother Surface: A smooth windshield surface allows windshield wipers to function more effectively and quietly.
• Better Water Repellency: After claying, applying a glass sealant or water repellent can help water bead and run off more easily, further improving visibility during rain.

Claying your windshield is a safe and effective way to maintain its cleanliness and clarity. Just be sure to use proper techniques and plenty of lubrication to avoid scratching the glass.