The answer to tough stains on tile and grout cleaning is that there are several common causes, including mineral buildup, mold and mildew, and ground-in dirt and debris. Symptoms may include discoloration, staining, and a rough or uneven surface. To address these issues, a combination of deep cleaning techniques is often required.
For DIY solutions, start with a tile and grout cleaner formulated for tough stains. Apply it to the affected areas, let it sit for the recommended time, then scrub with a stiff-bristle brush. You may also need to use a steam cleaner or grout brush to agitate the surface. For more stubborn stains, a diluted bleach solution or acidic cleaner like vinegar or lemon juice can be effective. However, if the stains persist or you're not comfortable with DIY cleaning, it's best to call in a professional tile and grout cleaning service.