The answer to 'how to clean grout yourself' is that you can clean grout using a grout brush, grout cleaner, and some elbow grease. Start by sweeping or vacuuming the area to remove any loose dirt or debris. Then, mix a grout cleaning solution according to the product instructions and apply it to the grout lines. Use the grout brush to scrub the solution into the grout, working in small sections. Let the solution sit for the recommended time, then rinse the area with clean water. For tougher stains, you may need to let the cleaner sit for longer or use a more abrasive scrubbing pad. Be sure to wear gloves and work in a well-ventilated area when using chemical cleaners.
Proper grout cleaning can help maintain the appearance and longevity of your tile floors and walls. However, if the grout is severely damaged or you're not comfortable doing it yourself, it's best to hire a professional cleaning service to ensure the job is done correctly.