You may look for common brands of toilet cleaner at your local hardware store or in the cleaning aisle at your grocery store.

Many eco-friendly toilet cleaners are made with plant and mineral-based products. They may also be scented with lemon, mint, or pine, a bonus for making your grout smell less wet or dirty.

Bleach can also strip the water-repellant materials that are in the grout, leading to damaged grout in the future, especially in showers or bathrooms. [4] X Research source If you do go for a toilet cleaner that contains bleach, make sure you wear rubber gloves, eye protection like safety goggles, and a respirator mask so you are not at risk of inhaling the bleach. You should also wear clothing that you would not mind throwing out, as bleach can damage your clothing.

Use a small amount of the toilet cleaner on the grout and leave it on for five minutes. If the grout does not appear damaged, you can proceed to use the toilet cleaner on the rest of the grout.

Pour a small amount of the cleaner on the grout. Do not pour too much cleaner on the grout or lay it on too thickly. You want an even amount dispersed on the grout so the cleaner can soak in and remove any dirt or grime. Allow the cleaner to stay on the dirty grout and soak in for five minutes. Do not touch or disturb the cleaner when it is sitting on the grout.

Scrub all of the grout that is covered with the cleaner. You should notice the grout appears clean and grime-free once you scrub it with the brush.

You should then dry the grout and the tiles well once the cleaner has been rinsed. Use a towel or soft cloth to do this. Do not use cloth that will scratch the surface of the tile or the grout. Alternatively, you can use a product like Goo Gone on the area with the grout. [9] X Expert Source Dario RagnoloHouse Cleaning Professional Expert Interview. 13 August 2019. Use an aluminum brusher to scrub the product after 3 minutes. [10] X Expert Source Dario RagnoloHouse Cleaning Professional Expert Interview. 13 August 2019. You can also use a homemade tile grout cleaner made with a half cup of baking soda, half a cup of white vinegar, and half a cup of water. [11] X Expert Source Dario RagnoloHouse Cleaning Professional Expert Interview. 13 August 2019.

You can attach a squeegee to the inside of your shower with a suction cup so it is right there at the end of your shower. Encourage others in your household to squeegee off the shower once they are done to keep the grout dry and clean.

You can find sealing products for grout at your local hardware store or online.

You may try cleaning the grout before you consider replacing it. If it does not respond well to cleaning, it may be time to switch it out for new grout.