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How to clean grout in shower

Feb 02, 2026 8 minute read

How to Get Rid of Mold in Shower Grout? What Actually Works? – Tried & Tested

If you’ve ever stepped into the shower and noticed dark lines, yellow stains, or stubborn black spots between tiles, you’re not alone. Shower grout absorbs moisture, soap residue, oils, and minerals. All these factors combine to create an environment where grime, mold, and mildew develop easily.

But here’s the beauty of grout, it can be cleaned using the proper technique, so it appears clean and fresh. In this guide, we will explore how to clean shower grout using different cleaning solutions and methods so you can have bathroom tile that looks its best.

Key Takeaways

  • Regular cleaning of shower grout prevents mold, mildew, and stubborn stains.
  • Natural remedies such as baking soda combined with vinegar or hydrogen peroxide, along with intensive cleaning methods like oxygen bleach or steam, do a good job of restoring grout.
  • Proper ventilation, drying surfaces, avoiding harsh chemicals, and sealing the grout all help to stop more damage and mold from occurring.

Why Shower Grout Gets Dirty

Before learning the best way to clean grout in shower areas, it helps to understand why and how it gets dirty in the first place. Grout made from porous cement absorbs water along with any liquid and dirt it comes into contact with, including soap residue and efflorescence. In a shower environment, grout lines are constantly exposed to:

  • Moisture and humidity
  • Soap scum and shampoo residue
  • Hard water mineral deposits
  • Body oils and dead skin cells

When surfaces are not dried properly or the room lacks efficient ventilation, mold and mildew start to grow. In this case, grout can weaken and act like a sponge that absorbs buildup, remaining dirty and discolored even when cleaned on a regular basis.


What You’ll Need to Clean Shower Grout

Having the necessary tools and products makes cleaning grout in a shower much easier. Chances are, you already have most of what’s needed to keep your surfaces immaculate.


1. Basic cleaning supplies:

  • Baking sodaWhite vinegar or hydrogen peroxide
  • Dish soap
  • Warm water
  • Spray bottle
  • Old toothbrush or grout brush
  • Sponge and microfiber cloth

2. For deep cleaning:

  • Oxygen bleach or specialized grout cleaner

  • Protective gloves

  • Steam cleaner (optional)

These cleaning products are safe for most common shower tile types like ceramic and porcelain, and help clean both the tile surface and grout without causing damage.

How to Clean Shower Grout Naturally

If the grout in the shower is slightly stained or has a dull look, natural cleaning methods can be the best way to clean shower grout effectively. Below are common solutions to consider:

1. Baking Soda and Vinegar Paste

One of the most common and natural approaches for shower grout cleaning involves using two household items that you might have in your home right now: baking soda and vinegar. Baking soda acts as a mild abrasive while vinegar aids in breaking down the buildup of dirt and stains.

The cleaning steps are as follows:

  • Mix baking soda with a few drops of water to make a paste
  • Apply the paste to the grout lines
  • Spray white vinegar over the paste and wait for it to fizz and bubble
  • Allow the cleaning solution to sit for 10-15 minutes
  • Scrub gently using a toothbrush OR soft bristle brush
  • Rinse well with warm water and dry with a microfiber cloth

If any stains remain, you can repeat the process to ensure the grout is fully clean. This method works well for keeping shower walls and floors clean and free from surface dirt.

2. Baking Soda and Hydrogen Peroxide

For slightly more difficult stains, hydrogen peroxide is more effective than vinegar. It helps break down the stubborn buildup and kills mold spores without damaging the tiles.

The steps to remove the stains are as follows:

  • Make a paste of baking soda and hydrogen peroxide
  • Leave it on grout lines for about 20 minutes
  • Gently scrub the grout, rinse thoroughly, and dry

This is a non-abrasive method that won't scratch or damage tile and perhaps the best way to clean shower grout with tough-to-remove stains and discoloration.

How to Deep Clean Stubborn Grout Stains

Sometimes natural methods aren’t enough. If your grout hasn’t been cleaned for long or has persistent stains that won’t simply go away, you’ll need a deep-cleaning approach using specialized products or mechanical tools.


1. Oxygen Bleach Cleaning

Oxygen bleach will clean shower tile grout safely and efficiently. Since it doesn’t give off a strong smell like chlorine bleach does, it is a more tile-friendly option while still removing tough stains and mineral buildup. When oxygen bleach breaks down grime, it releases oxygen molecules, which penetrate dirt and stains to help restore grout to its bright appearance.

2. Steam Clean Shower Tile Grout

Steam cleaning grout can be an effective way to keep shower floor tile looking its best. With this method, steam is used to penetrate deeply into the pores of the grout, loosening dirt, lifting grime, and killing bacterial and mold pores. This cleaning process is safe to use on different tiling materials, like our Misty Blue, Ivory Cream 16x48 Matte Ceramic Large Tile, or Smoke Blue 24x24 Matte Color Body Porcelain Large Tile. Steam cleaners are a preferred choice in homes where allergies are a concern since the cleaning agent used is free from harsh chemicals. The use of this cleaning method makes it possible to remove all stains present on the shower grout.

Benefits of steam cleaning:

  • No chemicals required
  • Kills mold and mildew
  • Safe for many tile types
  • Ideal for allergy-sensitive homes

How to Remove Mold and Mildew from Shower Grout

Mold is not just ugly to look at; it can also affect indoor air quality in the bathroom and may cause health problems if left untreated. If you are troubled with black or green spots, this section focuses on how to clean grout in shower areas that have been afflicted by mold.

1. Hydrogen Peroxide for Mold

Hydrogen peroxide is good on mold as it kills the mold spores, and it also helps to break down dark spots in grout, cleaning and brightening up.

Steps include:

  • Spray 3% hydrogen peroxide over grout
  • Let it sit for 10 minutes, then scrub gently
  • Rinse with clean water and dry thoroughly

2. Commercial Mold Removers

More serious cases of mold require the use of a commercial bathroom-specific mold remover. Always follow the manufacturer’s instructions closely and ventilate the area appropriately. Once cleaned, drying surfaces after every use is essential to avoid mold regrowth.

Conclusion

Learning how to clean grout in shower areas does not have to be daunting. With the right cleaning tools and method, it’s possible to keep grout looking bright and mold-free even in a wet environment. Whether using natural solutions or specialized cleaning products, regularity is your best shot at longevity. Clean grout improves the look of your shower tiles and puts you in a healthier and hygienic bathroom daily.

Frequently Asked Questions

1. How do I get my shower grout white again?

To restore white grout, use baking soda and hydrogen peroxide for mild stains. Oxygen bleach and steam may be used for tough-to-remove stains. Clean grout in the shower consistently and make sure the room is well-ventilated.

2. What do professionals use to clean showers?

Steam cleaners and commercialized grout cleaners are some of the products professionals use.

3. Can you put new grout on top of old grout?

You can put new grout on top of old grout, but it’s not recommended. For new grout to adhere properly, it’s best to scrape out the old material. Only then can new grout be applied to clean tile joints for a long-lasting finish. For detailed steps, read our blog: How to Regrout Tile: A Step-by-Step Guide for a Fresh, Clean Finish.

4. What should I avoid using on shower grout?

Avoid undiluted chlorine bleach, oil/wax-based products, or abrasive tools on shower grout. Using these can cause damage and erode the grout, which can lead to poor hygiene and difficult cleaning.

5. Why does my shower grout keep getting moldy?

Ongoing mold issues result from excessive moisture, inadequate air circulation, or unsealed grout. Even with the best cleaning methods, mold will return if moisture issues aren't addressed. Ensuring proper ventilation, drying shower surfaces after each use, and regular maintenance are key steps to prevent mold from returning.

6. Should I seal shower grout after cleaning?

Sealing grout helps prevent absorption of water and stains. It is one of the best steps to protect grout after cleaning.

7. Is colored grout harder to clean than white grout?

Colored grout conceals stains better but needs to be cleaned on a regular basis. Cleaning, regardless of grout color, is crucial to prevent unnoticeable buildup.
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Leah

Leah

Leah is a content writer reporting on all things tiles across verticals and new product collections ideal for your next home makeover. She joins Apollo Tile with a strong background in media and journalism. Her love for storytelling has contributed to the ability to create quality work that thoughtfully resonates with our customers.

In her current role, Leah researches and writes a range of tile content to give homeowners the insights they need to confidently bring charm into their living spaces. Keen to continue learning, she spends her free time reading and listening to podcasts as she believes self-growth pours into professional development. She’s committed to delivering compelling content that informs, inspires, and helps readers see flooring material—and their homes—in a new light.

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