How to Clean Mold in Shower Grout Naturally 

 June 12, 2022

By  Dale Keese

Mold grows and thrives in warm, moist, poorly ventilated areas, such as your bathroom, laundry room, kitchen, and basement, where air circulation is typically poor and humidity is always high. As a result, mold and mildew are likely to be found 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.

In this article, we will teach you how to clean grout naturally and effectively, not only for shower tiles but also for your bathroom walls and kitchen.

Mold removal from shower grout requires some effort and patience. Not only should you clean all visible mold patches, but you should also disinfect the entire area to ensure that all spores have been killed and your bathroom or kitchen is completely safe and sanitary.

So, how do you naturally clean shower grout? There are numerous methods for removing mold from shower grout and preventing it from returning.

Use Chlorine Bleach

Chlorine bleach is the most commonly used cleaning product to clean and remove shower grout because it not only cleans the mold effectively but also kills the mold spores and disinfects the entire area. It also cleans soap residue from the grout and tiles. This homemade grout cleaner can be used in two ways to remove mold from shower grout.

Cleaning Brushes

Method 1

To make this homemade grout cleaner, combine 1 part chlorine bleach and 4 parts water in a spray bottle. Wait about 30 minutes after spraying the grout cleaner on the affected area. Scrub the grout lines in the tile vigorously with a toothbrush. Rinse thoroughly with cool water. Repeat the process if necessary.

Method 2

Scrubbing the chlorine bleach directly on the mold or mildew with a toothbrush is another way to use this homemade grout cleaner. Allow the bleach to sit on the grout for 20–30 minutes before rinsing with warm water. Repeat the process if necessary.

However, there are a few things to keep in mind when using chlorine bleach to clean grout. Because bleach can cause discoloration or fading, avoid using it on colored grout or shower tiles. Because chlorine bleach fumes can irritate your eyes, respiratory tract, and skin, it is recommended that you use rubber gloves, goggles, and a mask when removing shower grout.

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

Use Baking Soda

Baking soda is an effective natural cleaner ingredient for cleaning grout. While baking soda is fairly effective at cleaning mold in shower grout and will not discolor or harm the tiles or pose any health risks to you or your family, it may not be as effective as bleach at cleaning and killing mold spores. There are several ways to clean grout with baking soda.

  • Make a solution of ½ cup baking soda in 1 gallon of water, then spray the affected area with this homemade grout cleaner solution. Allow the grout cleaner to sit for 30 minutes before rinsing thoroughly with warm water.
  • Dip a damp sponge into the baking soda powder. Scrub the grout lines and shower tiles with baking soda to clean them. Then, rinse thoroughly with warm water.
  • ½  cup baking soda and some water should be combined to make a thick paste. Directly apply the homemade grout cleaner paste to the moldy grout and tile. Allow the grout cleaner paste to sit for 10 minutes. Scrub the grout cleaner paste away with a stiff bristle brush, then rinse the tile and affected area with water. If necessary, repeat the procedure.

In the same way, you can use borax powder to clean mold and mildew from shower grout. Borax is a highly alkaline substance that works well as a tile cleaner, disinfectant, and deodorizer.

Use Salt

You can also use salt to make your own grout cleaner. You might be surprised to learn that salt can effectively kill single-celled organisms like mold. To effectively remove mold from shower grout and clean tile, simply apply salt to the grout and other mold-affected areas.

Wet a towel to accomplish this. Scrub the moldy grout lines with the damp towel after sprinkling salt on it. Allow the salt to sit overnight before rinsing the tile surfaces with clean water in the morning.

Cleaning Supplies

Use Vinegar

Vinegar is an excellent natural cleaning agent that can be used to make your own mold cleaner. Because it is acidic, it creates an environment that prevents mold and bacteria from growing. When you first notice mold growth on the shower grout, make a spray bottle solution of equal parts water and white vinegar and generously spray the homemade grout cleaner mixture onto the affected area.

Allow the grout cleaner to sit for about 30 minutes before vigorously scrubbing the tile surfaces with a bristle brush and rinsing with warm water. For best results, it is recommended that you repeat this cleaning process several times.

In the same way that vinegar is used to clean grout, you could use tea tree oil instead. In a spray bottle, combine 2 teaspoons of tea tree oil with each cup of water and spray this homemade grout cleaner on the moldy shower tile and grout. Wait a few hours before rinsing with clean water. When cleaning grout with these natural cleaners, make sure the windows are open and there is good air circulation in the room to offset the strong tea tree oil or vinegar smell.

However, if the shower mold growth is extensive and difficult to clean, natural products such as vinegar and tea tree oil may not be effective in cleaning grout and removing mold and mildew from tile surfaces.

Use Hydrogen Peroxide

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

  • To clean grout, make a thick paste with white flour and hydrogen peroxide. Leave this paste on the moldy grout and tile overnight. Rinse thoroughly with cold water in the morning.
  • You can also use the baking soda grout cleaning paste (discussed previously) to clean the moldy grout and tile. Pour hydrogen peroxide over the baking soda grout cleaning paste. The mixture of these grout cleaners will begin to fizz, loosening the mold in the grout. Rinse the tile surface with clean water after scrubbing it with a bristle brush. If necessary, repeat the cleaning procedure.


After reading about some of the natural methods for cleaning mold on shower grout, you will undoubtedly agree that the best way to clean mold in shower grout is to use natural grout cleaning products. However, even strong cleaners like bleach or hydrogen peroxide may not be strong enough to clean grout, kill mold spores, and completely eliminate the problem.

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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