TL;DR: Combine baking soda & white vinegar to create the perfect cleaning solution for tile grout. Scrub with a toothbrush and voila! For floor tiles, combine baking soda and hydrogen peroxide, apply paste, let sit, then scrub away and rinse off with warm water.
Cleaning Grout with Baking Soda
Baking soda is a safe deodorizer, whitener, and household cleaner—and it's an effective natural grout cleaner. Because baking soda is also a mild abrasive, using it for cleaning grout lines gives you extra firepower without the risk of scratching your tile.
Grout that hasn't been sealed, needs to be resealed, or is in poor shape should not be cleaned with vinegar. The vinegar penetrates into the pores of the grout, further weakening the material. Over time, vinegar will deteriorate the condition of the grout by etching or wearing it away.
Clean grout with a commercial grout and tile cleaner. Apply it to the dirty areas of the grout following the manufacturer's instructions. If you prefer cleaning grout with a DIY mixture, make a paste of 3/4-cup baking soda, 1/4-cup hydrogen peroxide and 1 tablespoon of mild dish soap.
Time. Make a baking soda paste with water and spread over tile and grout. Leave on overnight and spray with vinegar in the morning. Follow with your regular morning shower and rinse off any baking soda/vinegar residue.
To avoid damaging the grout, opt for a medium-bristle nylon brush, not a hard steel one. Simply spray warm water on the grout lines and scrub in a circular motion, then let it dry. Don't use too much water or let it sit on the grout for too long. Remember: Porous cement grouts absorb water, which could lead to mildew.
Method 2: How to Get Grout White Again with Lemon Juice or White Vinegar. Saturate the grout with lemon juice, a mild disinfectant that gets rid of grout stains naturally. You can also use white vinegar for chemical-free grout cleaning.
Although mixing vinegar and baking soda is not considered dangerous, you should still avoid mixing these in a container. Vinegar is acidic and basic soda is basic, so the by-products are sodium acetate, carbon dioxide, and water that are not toxic.
Bicarbonate of soda or cleaning with baking soda is an effective tile cleaner, especially for stubborn stains and grouting.
Vinegar can indeed ruin grout.
The grout will eventually wear off. So you should take not to apply vinegar for cleaning purposes if you have unsealed grout in the area.
Add 1/2 cup of baking soda to 1/4 cup hydrogen peroxide and mix into a paste. Follow with a teaspoon of dish soap. Apply the mixture to your floor grout and let it sit for 5–10 minutes. Use a clean cloth to wipe off the mixture, then rinse the floor with warm water and a mop.
Soap and water are going to be the gentlest option for cleaning grout and will not damage the sealant on the grout or tiles as you do so. Use a soft small brush, sponge, or a gentle toothbrush to get into the crevices of the grout.
What do professionals use to clean grout? Whether you believe it or not, most professionals use a solution of white vinegar and water with a 1:1 ratio. This solution is often more effective than dedicated Ph-neutral grout cleaners.
One of the most common causes for discolored grout is dirty mop water. Rather than cleaning the tile, mop water spreads the dirt from the tile into the grout. Since the grout is the lowest part of the floor, the dirt and grime from the mop water settles into the grout.
Apply bleach directly to the grout brush, scrub along the grout lines, and then rinse the tiles thoroughly to ensure all bleach is removed. Despite your best efforts, some deeply stained and discoloured grout may just need to be replaced.
Baking Soda, Vinegar, and Essential Oil Cleaning Method
Vinegar is safe to use on porcelain as long as you don't leave it on too long. This method can help clean yellowed porcelain.
Baking soda, which is a bit abrasive in nature, can effectively loosen up the dirt particles without causing any damage to the tile surface or the indoor air quality.