How to Clean Hard Water Stains on Car Windows

Hard-water stains on your car windows can not only be unsightly but dangerous because they can inhibit your sight while driving. Cleaning hard-water stains off your car windows is a pretty simple process that won't take more than a few minutes.

Things You'll Need

  • Distilled white vinegar
  • Water
  • Squirt bottle with mist setting
  • Old, soft cloth
  • Light, low-abrasive car polish, such as Eagle One Scratch Remover
  • Old T-shirt
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Instructions

    • 1

      Dilute the vinegar 2 to 1 with the water inside the squirt bottle and shake vigorously.

    • 2

      Spritz the vinegar solution generously over the hard-water spots. Let the solution set for a moment or two.

    • 3

      Moisten an old cloth with water and gently scrub away the vinegar solution. Continue scrubbing until the stains are gone.

    • 4

      Polish the glass if the hard-water spots were on your windows for a couple of weeks, as they may have etched into the glass.

    • 5

      Apply the car polish to an old T-shirt and polish the affected glass.

    • 6

      Buff until the area is free of scratches.

Tips & Warnings

  • Heavy water spots can be treated with pure vinegar. Vinegar will not harm your car; it's simply a mild acid capable of easily dissolving the alkaline-based mineral water found in hard-water stains.

  • If left untreated, hard water spots won't wash off with shampooing or regular glass cleaners.

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