Why Are My Quartz Countertops So Streaky?

Quartz countertops are popular in kitchens and bathrooms because of their durability, aesthetics, and low maintenance. However, even high-quality quartz can develop unsightly streaks over time with daily use. Understanding the causes of streaking and how to prevent it will help you keep your quartz looking pristine.

What Causes Streaking on Quartz Countertops?

There are several potential causes of streaking on quartz surfaces:

Oil and Grease Buildup

Quartz is non-porous, so oil and grease do not penetrate the material. However, residue can build up on the surface over time. Cooking oils, lotions, and other greasy products can leave behind streaky residue if not properly cleaned.

Hard Water Stains

Mineral deposits in hard water can leave behind streaky limescale buildup on quartz. This is especially common around sinks and faucets where water flows frequently.

Cleaning Chemical Residue

Using too much cleaner or failing to rinse thoroughly can cause streaky chemical film on the countertop. Harsh cleaners containing acids or bleaches are particularly problematic if left on the surface.


Prolonged exposure to acidic foods and chemicals can etch fine scratches into the quartz surface. These microscopic grooves refract light and show up as streaky lines.

Minor Scratching

Quartz is durable, but not scratch-proof. Daily use over time with appliances, cookware, and utensils can put fine scratches into the surface. When light hits these scratches, they show as streaks.

Variation in Quartz Pigments

Subtle differences in the distribution of colored quartz grains and resins can sometimes make one area appear lighter or darker. This can give the look of streaking in certain lighting.

Poor Initial Polishing or Finishing

Sometimes streaks are present right after installation. This can indicate that the quartz slabs were not polished evenly by the fabricator before cutting and installation.

How to Prevent Streaking on Quartz

The best defense is keeping your quartz sparkling clean and damage-free from the start:

Use Cutting Boards

Never slice or chop directly on the countertop. Always use a cutting board to protect the surface.

Clean Spills Promptly

Immediately wipe up oils, juices, wine, and other spills to prevent residue buildup.

Daily Cleaning

Use a gentle quartz cleaner daily to remove microscopic buildup and prevent deep staining.

Rinse Dishes Before Setting Down

Food and grease on dishes can transfer to the countertop and cause streaks over time.

Avoid Harsh Chemicals

Do not use abrasive cleaners, acids, or bleaches which can damage and discolor the quartz.

Treat Hard Water

Install water softeners, filters, or use distilled water for cleaning to prevent mineral buildup.

Use Protective Pads

Place hot pots, pans, and appliances on protective trivets or pads to prevent etching.

Handle with Care

Be gentle when handling quartz to avoid scratching the surface. Lift objects instead of sliding them across the countertop.

Best Practices for Cleaning Streaky Quartz

If streaks develop, use these best practices to safely restore the quartz to like-new condition:

Wash with pH-Neutral Stone Cleaner

Gently scrub using a soft cloth, sponge, or non-abrasive pad and pH-neutral stone cleaner. Avoid acidic cleaners.

Remove Grease Buildup with Degreaser

For oil and greasy streaks, use a degreasing cleaner formulated for stone surfaces.

Treat Hard Water Stains with Vinegar

Mix equal parts white vinegar and water and scrub gently to dissolve mineral deposits. Rinse thoroughly.

Remove Etch Marks by Sanding and Polishing

Use fine 400-grit sandpaper to smooth etch marks, followed by a quartz polish to restore luster.

Repair Minor Scratches with Fine Sandpaper

Gently sand in the direction of the scratch with 320-400 grit paper. Finish by polishing.

Deep Clean with Baking Soda and Hydrogen Peroxide

For stubborn stains, make a paste with baking soda and hydrogen peroxide. Let sit for 5 minutes before scrubbing.

Bleach Treatment for Severe Stains

In extreme cases, apply full-strength bleach and scrub with a stiff brush. Rinse immediately and thoroughly.

Call a Professional as Needed

For significant damage beyond DIY methods, hire a professional stone restoration company. They have specialized tools and training.

6 FAQs About Streaky Quartz Countertops

Why does my quartz look streaky in some lighting?

The sparkly flecks and veins in quartz can reflect light differently at certain angles. Shift lighting or viewing position to minimize this effect.

How can I restore the original polish to my quartz?

Use a stone polish containing diamond abrasives or silicon carbide. Apply with a soft cloth and buff to restore shine.

Is it normal for new quartz counters to have some streaks?

Minor streaking in brand new quartz can be normal. This should fade as the material cures and polish fully hardens after 30 days.

Can I use bleach or acidic cleaners on quartz?

No, avoid bleaches, acids, alkalis, and abrasives. Always use pH-neutral cleaners specially formulated for quartz and stone.

What quartz colors show streaks the most?

Solid darker colors like black and darker granites tend to show streaks more than lighter quartz with more pattern and veining.

How do I know if streaks are etching or just surface residue?

Rub the streaks firmly with a damp cloth. If it’s etching or scratches, the marks will remain. If just residue, they will wipe away.


Streaky quartz countertops don’t have to be an eyesore. With proper care and regular light cleaning, you can minimize the appearance of streaks and keep your counters looking like new for years. Avoid harsh chemicals and abrasives, treat hard water spotting promptly, and use cuttings boards to prevent scratching and etching. Over time, some periodic deep cleaning may be needed to remove residue buildup. But with the right gentle techniques and products, you can safely clean streaky areas and restore the beautiful polished finish without damaging the quartz surface. With regular care and maintenance, your quartz counters will stay stunningly streak-free.