How to Clean Mold in Shower Grout Naturally 

 December 16, 2020

By  Dale Keese

Mold grows and thrives in warm and moist places that are not well-ventilated, which makes your bathroom, laundry room, kitchen, and basement ideal for mold infestation since the air circulation is usually poor and humidity is always high. So, you are likely to find mold and mildew in these rooms—on the walls, between the tiles, caulking, or ceilings.

Mold can be removed naturally from your shower using common household products such as salt, vinegar, and baking soda along with a stiff brush and scrubbing. Other household chemicals that can also be used include chlorine bleach or hydrogen peroxide.

Minimalist Bathroom

However, most commonly, you will find mold on tile grout. The reason for this is that tiles are usually used in areas where there is plenty of moisture such as bathroom floors and walls, shower areas, and kitchen backsplashes; the uneven and porous surface of the grout makes it particularly vulnerable to mold growth.

Mold growth on grout not only makes your bathrooms, shower tiles, and kitchen look dirty and old but also poses serious health risks and may even compromise the structural integrity of your home. You need to find efficient ways on how to clean grout and how to prevent mold growth in order to prevent the problems caused by mold and save yourself time and money. 

The best way to clean tile grout is to remove any mold from the tile grout with a grout cleaner as soon as you notice it. But it is better to prevent the mold from growing at all. An effective way to prevent the growth of mold and mildew is by sealing the grout using a high-quality grout sealer right after you are done removing mold and mildew with your grout cleaner. 

In our article, we will provide all that you need to know about how to clean grout naturally and effectively, not only for shower tiles but also for your bathroom walls and kitchen as well.

Removing the mold from the shower grout needs some effort and patience. Not only should you clean all the patches of mold that are visible but you must also disinfect the entire area to ensure that all the spores have been killed and that your bathroom or kitchen is completely safe and hygienic.

So, how can you clean shower grout naturally? There are many different ways by which you can clean the mold from your shower grout and prevent it from growing again.

Use Chlorine Bleach

The most commonly used cleaning products to clean and remove shower grout is chlorine bleach, which not only cleans the mold effectively but also kills the spores of the mold and disinfects the entire area. It also removes soap residue buildup from the grout and the tiles. There are two ways to remove mold from the shower grout using this homemade grout cleaner.

Cleaning Brushes

First Method

To make this homemade grout cleaner, in a spray bottle, mix 1 part chlorine bleach and 4 parts water. Spray the grout cleaner on the affected area and wait for around 30 minutes. Then, using a toothbrush, scrub the grout lines in the tile vigorously. Rinse with cool water. If required, repeat the process.

Second Method

Another method to use this homemade grout cleaner is scrubbing the chlorine bleach on the mold or mildew directly with a toothbrush. Allow the bleach to rest on the grout for around 20–30 minutes and then rinse off with warm water. If necessary, repeat the process.

However, there are a few things to remember when cleaning grout using chlorine bleach. The bleach may cause discoloration or fading and so you should take care not to use it on colored grout or shower tiles. The fumes from the chlorine bleach can irritate your eyes, respiratory tract, and skin and so it is recommended that you wear rubber gloves, goggles, and a mask while using the bleach to remove shower grout.

Also, make sure that you open the windows or ventilate the room well while you are cleaning with bleach and leave the windows and doors open for one to two hours after you finish cleaning grout to ensure that all the harmful fumes are removed from the room.

Use Baking Soda

Baking soda is an effective homemade cleaner ingredient to clean grout naturally. While using baking soda to clean the mold in your shower grout is fairly effective and will not discolor or harm the tiles or have any health risks to you and your family, it may not be as effective as bleach in cleaning and killing mold spores. There are different methods of how to clean grout with baking soda.

  • Make a solution with ½ cup of baking soda in 1 gallon of water and then spray this homemade grout cleaner solution on the affected area. Let the grout cleaner rest for half an hour and then rinse thoroughly using warm water.
  • Using a damp sponge, dip it into the baking soda powder. To clean the grout, scrub the grout lines and the shower tiles with the baking soda. Then, rinse clean using warm water.
  • Make a thick paste using ½ cup of baking soda and some water. Apply the homemade grout cleaner paste directly on the moldy grout and tile. Let the grout cleaner paste rest for around 10 minutes. Using a stiff bristle brush, scrub the grout cleaner paste away and then rinse the tile and affected area with water. Repeat the process if required.

You can also make use of borax powder, in the same way, to clean mold and mildew in the shower grout. Borax is highly alkaline and is a very effective tile cleaner, disinfectant, and deodorizer.

Use Salt

You can use salt as a homemade grout cleaner too. You would be surprised to know that salt can kill single-celled organisms such as mold very effectively. So, to remove mold from the shower grout and clean tile effectively, all you need to do is apply salt on the grout and other areas affected by mold.

To do this, take a towel and wet it. Sprinkle the salt on the damp towel and then scrub it on the moldy grout lines. Let the salt remain overnight and in the morning, clean tile surfaces by rinsing with clean water.

Cleaning Supplies

Use Vinegar

Vinegar is an excellent, natural cleaning agent that you can use as a homemade mold cleaner. Because it is acidic, it creates an environment that prevents the growth of mold and bacteria. When you first see signs of mold growth on the shower grout, in a spray bottle, make a solution of equal parts of water and white vinegar and spray the homemade grout cleaner mixture onto the affected area generously.

Let the grout cleaner rest for around 30 minutes and then scrub the tile surfaces vigorously with a bristle brush and then rinse with warm water. It is recommended that you repeat this cleaning process many times for best results.

You could use tea tree oil instead of vinegar to clean grout in the same way mentioned above. Add 2 teaspoons of tea tree oil to each cup of water in a spray bottle and spray this homemade grout cleaner on the moldy shower tile and grout. Wait for a few hours and then rinse with clean water. When cleaning grout with these natural cleaners, ensure that the windows are open and there is good air circulation in the room to offset the strong smell of the tea tree oil or vinegar.

However, if the shower mold growth is very extensive and is hard to clean, then natural products like vinegar and tea tree oil may not be sufficiently effective to clean grout and remove mold and mildew from tile surfaces.

Use Hydrogen Peroxide

When all the above methods fail, you could use hydrogen peroxide as a grout cleaner for shower mold removal, which is a very effective fungicide cleaner as well as a whitening agent. Make a mixture of hydrogen peroxide and water and spray this grout cleaner mixture on the moldy area; however, applying the hydrogen peroxide directly on the moldy grout can be more effective and give better grout cleaning results.

  • To clean grout, mix some white flour and hydrogen peroxide and make a thick paste. Apply this paste to the moldy grout and tile and leave it overnight. In the morning, rinse well with cold water.
  • You can also apply the baking soda grout cleaning paste (as discussed earlier) over the moldy grout and tile. Over this baking soda grout cleaning paste, pour hydrogen peroxide. The mixture of these grout cleaners will start fizzing, which will loosen the mold in the grout. Scrub the tile surface with a bristle brush and then rinse with clean water. Repeat this cleaning process if needed.
Girl in the Shower


Now that you have read about some of the methods of cleaning mold on shower grout naturally, you will surely agree that the best way to clean mold in the shower grout is by using natural grout cleaning products. However, sometimes, even strong cleaners such as bleach or hydrogen peroxide may not be potent enough to clean grout, kill the mold spores, and eradicate the problem completely.

In such cases, if you feel that the mold problem is too much for you to clean on your own, it may be a good idea to use professional mold removal and remediation professionals who will use advanced tools, grout cleaners, cleaning techniques, and grout sealers to remove the mold before it spreads uncontrollably and causes damage to your health and home. To lessen occurrences of this grout problem in the future, it is best to seal your grout to give it more protection and lessen your cleaning needs.

About the author

Hey, I'm Dale Keese.. thanks for reading.. hopefully this article can save you some time and trouble with your sealing job. I'm also in the process of making some video walk-throughs for youtube so check back soon! thanks

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