First, wipe down the grout with hot water to remove surface dirt and grime. Next, spray a cleaning solution on the grout. You can mix your own by putting a 50-50 mix of vinegar and water into a spray bottle. Spray on the grout, let stand for five minutes and then scrub with a soft brush. Use a toothbrush or other small scrub brush to scrub the grout.
How To Restore Grout: An Update. After a good clean with Clorox Clean-Up, I started dabbing the tile guard on the grout. Very quickly I could see that this method was not going to work. The liquid wasn't coming out fast enough. So I cut the dabber top off and just poured the liquid on the grout lines. I took cotton balls and spread it out.
Step 1, Make a paste of baking soda and water. Mix 3 parts of baking soda to 1 part water to make a thick paste. This versatile cleaner will work with all colors of grout, but vinegar can be harmful to some natural stones such as marble or limestone. Apply the paste to the grout lines with your finger. Although the baking soda isn't harmful, wearing rubber gloves can help prevent scratches or Step 2, Make a 1:1 solution of white vinegar and water in a spray bottle. Spray the baking soda
First, wipe off the countertop with a commercially prepared tile cleaner, or make your own cleaner by combining 1 ⅔ cup baking soda, ½ cup liquid soap, ½ cup water, 2 tablespoons of vinegar. This will remove the day-to-day dirt. You're going to start with the grout, because it will be the dirtiest part of the tile counter.
Before you clean your grout, start by cleaning the tile to remove any surface dirt. Mix hydrogen peroxide and baking soda in a small bowl to form a thick paste, then spread the mixture on the grout with a toothbrush, working in small areas of about 1 to 2 square feet.
Whether you're cleaning grout lines in a shower or across an entire tile kitchen floor, you can restore those grout lines to a nearly new appearance by using a small scrub brush (nothing too stiff) or toothbrush, bleach and, of course, a little bit of elbow grease.