Best Way to Clean Mold in Shower Grout


Mold in the Grout Lines

If you’ve been reading any of the previous blogs I’ve done, you know that mold is everywhere.  You also know that not all mold growth is dangerous. Without it, we wouldn’t have blue cheese or penicillin. That said, it’s still very annoying, especially when you are trying to clean mold in shower grout. The bathroom is usually very wet and warm, and we use it every day. And since we wash ourselves in the shower as well, we often leave behind a buffet of skin flakes for spores in the shower walls. And as a final straw, nobody really likes cleaning the bathroom.  Doing so will help keep mold and mildew from forming in the nooks and crannies of the bathroom, but let’s assume you’ve let it slip. Now, there’s spots and a funky smell in the bathroom! What should you do next? Does this mean that your expensive shower tilework is now ruined? Not necessarily.  There are some simple ways to take care of it using a couple home remedies and store-bought cleaners.  So, without further ado, here are some of the best ways to clean mold in shower grout.

A NOTE: As always, be careful when handling chemicals. They can make a mess of things, but this is especially important in a confined space like a bathroom. Make sure you have it well-ventilated. If you have a fan in the bathroom, turn it on while you’re working and if you have windows, make sure they’re wide open.

So, without further ado, here are some of the best ways to clean mold in shower grout.

The Quick Fix:  Vinegar and Baking Soda

The first thing you can try for removing mold in shower grout is a combination of vinegar and baking soda. This can be one of the best way to clean mold in shower grout on a budget.  It might not work like a miracle, but it can work quite well if you’re smart about it. Soon, you can get rid of mold from the shower door, shower curtain, shower caulking, and more. Yes, mold grows in all these places! You’ll need the following for this solution:


-White Vinegar

-Baking Soda

-A toothbrush

-A scouring pad

-A spray bottle can be useful, but you can use a sponge as well


First, you want to apply the vinegar to the affected areas. You can spray on the vinegar, or you can rub it on with your sponge or a pad. Make sure you get a good amount on there. Once it’s good and soaked, let it sit for a couple hours. After that, use your scouring pad with some elbow grease! Scrub away with it until it’s gone. Use the toothbrush for hard to reach places that you can’t get with your pad.

Once that’s done, time to do some detail work. Make a paste with the baking soda and some water at a rough ratio of 3 to 1. This’ll make a paste. Apply this paste to mildew and mold in the grout. Then apply the vinegar and scrub some more. Depending on how bad the mildew is, you may need to scrub hard or use something tougher to get it off. Once it’s all done, rinse it away with water.

Something Stronger:  Bleach and Store-Bought Chemicals

If the vinegar and baking soda isn’t doing the trick, then it’s time to get serious. And by serious, I mean our old friend: sodium hypochlorite. This is better known as good old-fashioned liquid bleach. For this technique, we’ll be mixing it with baking soda and spraying it. As always, when using chemicals like bleach, handle them with care.  Remember to always add the bleach to water, not water into bleach.

Mix up a little liquid soap, a cup of baking soda, and an essential oil to make a paste and apply it to the mold in the grout. You may have to do a little scrubbing as you apply it. This should help remove or loosen up most of the mold. Then, make up a bleach solution of 2 parts water to 1 part bleach. A spray bottle is a good idea here as it’ll make applying the solution easier. Apply the solution to the area and let it dry.

Scrub, Scrub, Scrub

After your solution is dried, come back, apply it again and give it a good scrubbing. Pay attention to the material of your shower. It may need a special pad to scrub with so you don’t leave scratches or ruin the finish of the tiles. If it’s fiberglass, you’ll want something that won’t scratch it up. You do not need to make your own solution and can use store-bought cleaners. There’s lots of sprays that will work just as well and, in some cases, better than the homemade solution here. Remember, bleach is best used to get rid of the look of mold, since it bleaches the mold spores. The real magic is done with baking soda and vinegar, which kills mold.

After you’ve scrubbed it a second time, rinse it with water. You may need to repeat this process a few times to remove all the mold from the grout. You may find that you can’t completely remove it. In which case you’ll need to get out the caulk gun and replace the grout. Yes, this is a pain, but sometimes the mold growth is just too bad to remove completely.

An Ounce of Prevention

The best way to clean mold in shower grout is to not clean it at all. No, we don’t mean “don’t clean your shower”! What we’re saying is,  you want to prevent it from appearing in the first place.  To do that, you need to regularly clean the bathroom. Washing the tiles as part of your cleaning can keep it from spreading or appearing. Washing any rugs in the bathroom whenever you do the floors is another good way to go about preventing unwanted growth. And keep your scrubs and bottles out of the shower. These can provide places that mold can breed and hide.

Another very simple and cheap solution is running the fan during and after a shower. This will help get the extra moisture out of the air, and thus, the room. You’ll want roughly half an hour of it running after your shower to ensure it gets a lot of the moisture out. One reliable method though is to get a squeegee. After every shower, use the squeegee to get the water off the walls. This will take care of a great deal of the water and can help clear any off that might be in the grout too. And that can help prevent the mold and mildew from forming.

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