There is no definitive answer, as the best grout cleaner will vary depending on the type of grout and the severity of the dirt or stains. However, general-purpose cleaners such as bleach, vinegar, and baking soda can often be effective when used together or separately. For more stubborn dirt or stains, a specialist grout cleaner may be necessary. These products are available at most hardware stores and typically involve either steam cleaning or a scrubbing brush action to remove the dirt. Always read the manufacturer's instructions carefully before using any type of grout cleaner.

It depends on the type of grout. For example, if you have white grout, a diluted bleach solution will usually work well. If you have colored or stained grout, a commercially available grout cleaner may be necessary. Be sure to read the product label to make sure that it is safe for your specific type of grout. general-purpose cleaners (such as409) or ammonia-based cleaners can also be used to clean grout, but they should be used sparingly and in moderation because they can damage the grout over time. For best results, always follow the instructions on the product label.