When you first moved into your home, you probably admired the elegant ceramic tiles in your kitchen or bathroom. But over time, you might have noticed that the once-pristine white grout between those tiles started to darken, turning gray, brown, or even black. This discoloration happens as grout absorbs dirt, spills, soap scum, and even mold. Fortunately, learning how to clean white grout the right way can make your tiles look brand new again without damaging them.

In this guide, you’ll discover effective, easy-to-follow methods to clean white grout, remove stubborn stains, and prevent future buildup. Whether you prefer DIY natural solutions or deep-cleaning formulas, these proven techniques will help you restore your grout’s original brilliance.

Why Grout Turns Dirty or Discolored

Before jumping into cleaning methods, it helps to understand why grout gets dirty in the first place. Grout is a porous material, meaning it easily absorbs liquids, dirt, and soap residue. In kitchens, food particles and grease can settle into the lines. In bathrooms, moisture encourages mold and mildew growth. Over time, this combination causes discoloration, making even the cleanest tiles look dull.

Regular maintenance and quick spill cleanup can go a long way, but if your grout is already darkened, it’s time for a deep clean.

How Often Should You Clean White Grout?

Experts recommend deep cleaning white grout every four to six months to maintain its brightness and prevent staining. However, high-traffic areas such as kitchen floors or shower tiles may need more frequent cleaning. Using a grout sealant after cleaning helps block future stains, reducing how often you’ll need to scrub.

Method 1: How to Make Grout White Again with Baking Soda, Ammonia, and Vinegar

If your grout is heavily stained, this powerful homemade mixture can lift dirt and restore whiteness effectively.

What You’ll Need:

  • 7 cups warm water

  • ½ cup baking soda

  • ⅓ cup ammonia

  • ¼ cup white vinegar

  • Small brush or old toothbrush

  • Bucket or spray bottle

Steps:

  1. Combine the warm water, baking soda, ammonia, and vinegar in a bucket. Stir well.

  2. Apply the mixture to the grout using a sponge or spray bottle, making sure to saturate the lines.

  3. Let the solution sit for several minutes to break down stains.

  4. Scrub the grout thoroughly with a small brush or old toothbrush.

  5. If the stains persist, reapply the mixture and let it sit for up to one hour.

  6. Rinse the area with clean water and dry it with a towel or rag.

Tip: This method is ideal for kitchens or heavily used floors where grease and grime tend to build up.

Method 2: How to Get Grout White Again with Lemon Juice or White Vinegar

If you prefer a chemical-free cleaning method, lemon juice and white vinegar are two natural disinfectants that work wonders on mildly stained grout.

What You’ll Need:

  • Lemon juice or white vinegar

  • Small brush or toothbrush

  • Towel or rag

Steps:

  1. Pour lemon juice or vinegar directly over the dirty grout lines.

  2. Let it sit for 10 to 15 minutes to loosen grime and disinfect the surface.

  3. Scrub gently with a brush to lift stains.

  4. Rinse thoroughly with water and wipe dry.

Tip: Lemon juice adds a fresh scent, while vinegar effectively removes soap scum and mild mildew. This method works best for routine grout maintenance.

Method 3: How to Keep Grout Clean with Oxygen Bleach

Oxygen bleach is a non-toxic, fabric-safe cleaner that tackles tough grease and mold stains with minimal effort. It’s especially useful for bathroom grout exposed to constant moisture.

What You’ll Need:

  • Warm water

  • Powdered oxygen bleach

  • Spray bottle or bowl

  • Small brush or toothbrush

Steps:

  1. Mix the warm water and powdered oxygen bleach until fully dissolved.

  2. Apply the solution generously to dry grout lines so it can soak in deeply.

  3. Let it sit for at least 15 minutes, or longer for better results. Oxygen ions will continue to clean for up to six hours.

  4. If the grout absorbs all the cleaner before time is up, reapply as needed.

  5. Scrub gently to lift any remaining stains.

  6. Rinse and dry thoroughly.

Tip: For best results, use this method every few months, followed by a sealant to protect the grout from future stains.

Pro Tips for Keeping White Grout Clean Longer

  1. Apply a grout sealer after deep cleaning to create a protective barrier.

  2. Clean up spills immediately, especially in kitchens.

  3. Wipe shower tiles dry after each use to prevent mold growth.

  4. Use a gentle cleaner weekly to maintain brightness.

  5. Avoid harsh chemicals that can damage tile glaze or weaken grout.

When to Replace Grout

If deep cleaning doesn’t restore your grout or if you notice cracks and crumbling, it might be time to re-grout the tiles. Re-grouting not only improves appearance but also prevents water damage and mold buildup underneath the tiles.

Final Thoughts: Keep Your Grout Bright and Beautiful

Learning how to clean white grout properly helps you preserve the beauty and cleanliness of your tiled surfaces. Whether you choose baking soda, vinegar, or oxygen bleach, consistent maintenance is key. With regular care, sealing, and quick cleanup, you can enjoy bright, spotless grout that enhances the look of your entire home.