Can I use vinegar to remove hard water stains from granite?

No, vinegar is acidic and can etch the granite surface, leaving dull spots. Use a mild dish soap and water solution instead.

How often should I reseal my granite countertop?

It depends on the sealant and usage. Test by sprinkling water on the surface; if it soaks in quickly, it's time to reseal. Typically, resealing every 1-2 years is recommended.

What should I do if the hard water stains are very stubborn?

Try a baking soda paste or a pH-neutral stone cleaner. If stains persist, consult a professional stone restorer to avoid damaging the surface.

Surface Safety

How to Remove Hard Water Stains from a Granite Countertop: A Surface-Safety Guide

Hard water stains on a granite countertop can make it look dull and crusty. Here's a practical, surface-safe guide to remove them without damaging the stone or sealant.

Published August 16, 2026 Updated August 26, 2026 5 min read

Part 2: Safer action steps

If the stains are still visible after this method, you may need to repeat the process or try a specialized stone cleaner. However, avoid using vinegar, lemon juice, or any acidic product, as these can etch the granite.

What Not to Do

Granite is durable, but it has limits. Here are the key things to avoid:

Do not use acidic cleaners. Vinegar, lemon juice, and other acidic substances can dull the surface and damage the sealant.
Avoid abrasive scrubbing pads. Steel wool or scouring pads can scratch the stone and remove the protective seal.
Do not use harsh chemical descalers. Products designed for metal or glass can be too strong for natural stone.
Never let water sit. Wipe up spills immediately to prevent mineral buildup.

Fresh vs. Dried Stains

The method above works for both fresh and dried hard water stains, but the approach differs slightly:

Fresh stains: If the water spots are recent, a simple wipe with a damp cloth and drying is often enough. The minerals haven't had time to bond tightly.
Dried stains: For older, crusty spots, you may need to let the soapy solution sit on the area for a few minutes before wiping. This helps soften the mineral deposits. You can also use a soft-bristled brush (like a toothbrush) to gently work the solution into the stain, but be careful not to scrub too hard.