2. Apply a grout sealer. This will help to protect the grout from future staining and damage. Choose a grout sealer that is specifically designed for the type of grout that you have. Apply the sealer according to the manufacturer's instructions.
3. Buff the grout. This will help to bring out the grout's natural color and shine. Use a soft cloth to buff the grout lines until they are shiny.
4. Repeat steps 2 and 3 as needed. The grout may need to be sealed and buffed multiple times to achieve the desired results.
Here are some additional tips for getting grout back to its original color:
* Test the cleaning solution on a small area of grout before applying it to the entire surface.
* Be careful not to scrub the grout too hard, as this could damage the grout.
* If the grout is badly stained, you may need to use a stronger cleaning solution. However, be sure to test the solution on a small area of grout before applying it to the entire surface.
* If the grout is still not the desired color after following these steps, you may need to have it professionally cleaned.