To clean tile grout effectively, a highly recommended DIY method is to use a paste made from baking soda and hydrogen peroxide. Apply the paste to grout lines and let it sit for about 5 to 15 minutes. Then scrub the grout with a brush in circular motions to lift dirt and stains. After scrubbing, rinse well with water. If stains persist, repeating the process may be necessary. Another common method involves mixing baking soda with water to create a paste, applying it to grout, then spraying vinegar solution over it. The bubbling reaction helps break down grime. After that, scrub and rinse thoroughly. For regular cleaning, dish soap mixed with warm water can also help remove soap scum and grime when sprayed on tiles and scrubbed. Professionals often use oxygen bleach powder mixed with boiling water, steam cleaning, or machine scrubbers for larger areas, but these home remedies are effective for most residential grout cleaning needs. Summary of key steps:

• Make a paste of baking soda and hydrogen peroxide or baking soda and water.
• Apply paste to grout and let sit 5-15 minutes.
• For baking soda paste, spray vinegar over it to activate cleaning.
• Scrub grout lines with a brush.
• Rinse thoroughly with water.
• Repeat if necessary for stubborn stains.

Use gloves to protect hands during the process. Avoid using harsh chemicals or vinegar alone on unsealed grout to prevent damage.