How to remove acid rain from a car window

Water stains can be a huge problem, especially when they do so for its small size with strength in numbers. Acid rain spots, however, can be much more problematic in the long run. Often producing a cloudy effect or cloudy outside windows, acid rain can really eat into your glass as it dries, and leave permanent marks. But even these spots can potentially be overcome with appropriate methods. Read on to learn how to remove acid rain from a car window.


Clean your window as usual, with a cloth lint. The spots remaining from acid rain are sometimes difficult to distinguish from water stains simple – hopefully, your glass is just dirty, and not damaged. Tracking the wipe down initial application with Windex. Try to let the window of direct sunlight to dry, to avoid ugly scratches.

Dust corners with a thin layer of sodium bicarbonate (baking soda). Take a damp cloth and wipe water stains with a generous amount of elbow grease. Baking soda is an abrasive effective, readily available that allows us to remove stains without damaging the underlying glass. For an additional abrasive edge, consider rubbing with an old toothbrush.

Apply a small amount of cutting compound to a super-fine pad of steel wool. Compound cutting an abrasive suspended in a paste which you can then apply to your glass and soap scrub pad more effectively than a simple cloth. Test on a small piece of glass before applying this method to the entire window, to ensure that your window treatment will last.

Attack any other point with the same amount of energy and elbow grease – acid marks can be incredibly persistent, and at this point you’re polishing more than being cleaned. After a suitable amount of effort, check to see if the stains remain. If stains are still easily detectable, try to repeat this step while using a composite cutting grain size smaller.

Assess the outcome, after all reasonable efforts have been exhausted. As the name suggests, acid rain actually recorded on the glass surface. If the damage is enough that affects the functionality of the large window, you may have to bite the bullet and get a new glass.

Tips & Warnings

  • Consult your local repair shop to see how brands of acid rain can be prevented in the first place. A preventive application of baking soda, as in step 2, you can help prevent acid rain marks formation.