1. Start with a deep clean.
Before you can whiten your grout, you’ll need to remove any accumulated dirt and grime. Spray your grout lines with a mixture of equal parts vinegar and water, and let it sit for a few minutes. Then, scrub the grout lines with a stiff-bristled brush and rinse thoroughly with hot water. For stubborn stains, you may need to use a commercial grout cleaner or a homemade solution of baking soda and water.
2. Use a bleach-based cleaner.
Bleach is a powerful whitening agent that can be very effective at removing deep-set stains and discoloration from grout. Mix 1/2 cup of bleach with 1 gallon of water, and dip a stiff-bristled brush into the solution. Scrub the grout lines thoroughly, then let the bleach solution sit for 10-15 minutes. Rinse the area well with hot water, and mop up any excess liquid with a clean towel.
3. Try hydrogen peroxide.
If you prefer a gentler solution, hydrogen peroxide can also be effective at whitening grout. Combine 1 part hydrogen peroxide with 2 parts water, and apply the solution to the grout lines with a spray bottle or a soft-bristled brush. Let the hydrogen peroxide sit for 10-15 minutes, then rinse thoroughly with hot water. Repeat the process as needed until the grout is as white as you’d like it to be.
4. Make a paste with baking soda.
Baking soda is a natural cleaning agent that can help lift stains and discoloration from grout. Make a thick paste by mixing baking soda with a small amount of water, and apply it to the grout lines with a stiff-bristled brush. Let the paste sit for 5-10 minutes, then scrub the grout lines thoroughly and rinse well with hot water. For even more cleaning power, add a few drops of vinegar to the baking soda paste before applying it to the grout.
5. Apply a grout sealer.
Once you’ve successfully whitened your grout, it’s important to protect it from future stains and discoloration. Apply a grout sealer to the freshly cleaned grout lines, using a brush or a roller. The sealer will help repel liquids and dirt, making it easier to keep your grout looking bright and clean over time.
Whitening your grout can be a time-consuming process, but the results are well worth the effort. With a little elbow grease and the right cleaning agents, you can restore your grout to its original pristine condition and enjoy bright, beautiful tiles once again.