The answer to 'how to clean grout' is to use a grout brush and a grout cleaning solution. Grout can become discolored or stained over time due to spills, dirt, and mildew buildup. To clean grout, first sweep or vacuum the area to remove any loose debris. Then, apply a grout cleaning solution to the affected area and let it sit for 5-10 minutes. Use a stiff-bristle grout brush to scrub the grout lines, working in small sections. Rinse the area with clean water and repeat the process if necessary. For tough stains or heavily soiled grout, you may need to use a grout haze remover or a steam cleaner for more effective results.
If the grout is severely damaged or you're unsure of the best cleaning method, it's best to call a professional cleaning service. They have the right tools and expertise to restore your grout to its original condition without causing further damage.