How do I clean bathroom tile grout?

Mix a half cup of baking soda, 1/4 cup hydrogen peroxide, and 1 tsp of dish soap. Apply to grout and let it work for 15-20 minutes. Scrub with an old toothbrush and rinse.

Here are 3 methods to do this:

https://www.wikihow.com/Clean-Bathroom-Grout

Keep in mind that in some cases, the problem with not being able to keep grouting clean may be resulting from either:

1-the sealant has worn off, and needs to be reapplied

2-the grouting itself has worn down, and needs to be regrouted

Here's a link that may help you.....just remember the clean grout will remain clean longer if it is resealed after cleaning.

https://www.hometalk.com/search/discussions?filter=cleaning%20grout%3F

Start by creating a paste-like mixture using one part hydrogen peroxide and two parts of an oxygenated powder product, such as OxiClean or generic washing soda. The thick combination of these powerful ingredients will adhere to the grout lines in your shower without dripping away and spot-treat areas affected by mildew and mold. It’s not too harsh to use as a defense against spores, either, so even if the grout doesn’t look dirty, consider applying it as an effective cleanser that will aid in preventing mold from blossoming. If you look at ingredients in many of the heavy-duty mold abatement products, you’ll spot that hydrogen peroxide is a common ingredient, so it’s no surprise that this at-home solution works really, really well.

With the paste in a bowl, use an old toothbrush to apply it to the grout lines between the tiles in your shower.

Here are several ways other Hometalkers have done it

https://www.hometalk.com/search/posts?filter=clean%20grout

Try scrubbing the grout with borax powder

You can simply combine together half cup of baking soda, 1/4 cup of hydrogen peroxide, and 1 tsp dish soap. Apply cleaning mixture onto grout, wait 5-10 minutes, scrub and rinse

Heat up 1 cup of white vinegar, mix in about 1/4 cup of Dawn Premium. Not the dollar store kind, because it is too thin. When mixed, pour into a spray bottle and fill with water. Shake. Spray down the grout and let it sit overnight. In the morning rinse. If you have stubborn stains, spray again. Use this mixture a few times a week. It will keep your grout and tiles clean. Also works wonders in the toilet bowl to keep hard water stains at bay. Oh you only have to heat the vinegar one time when you add the Dawn.

If you want to completely change the color of your grout. There is a product by Mapei called Grout Refresh. You can find it in Floor and Decor and Home Depot sells a few colors, but Amazon has many colors. It is not hard to use, just time consuming. I changed the color of my 2 bathrooms grout several years ago. It has a sealer that prevents stains, and it still looks brand new.

I have used toilet bowl cleaner (Lysol brand in black bottle) on tough stains. Heated vinegar with blue dawn 50/50 will work well too.

Hands down, hydrogen peroxide and baking soda. Grab an old toothbrush, a little scrubbing and it’ll be like new again. Be sure to seal it up after.

Hi Ron, hope this helps you out,

https://www.bobvila.com/articles/cleaning-grout/