Mix 1 c (240 mL) of vinegar and 1 c (240 mL) of water in a spray bottle. Measure the vinegar and water into a spray bottle. Screw the lid on tightly and then shake the spray bottle vigorously for 5 seconds to combine the water and vinegar.
Malt vinegar and white vinegar both work well for this method. This method works on all types of tiles and surfaces, such as flooring, backsplashes, or countertops. Spray the solution liberally over the grout and let it sit for 5 minutes. Ensure that all the grout is coated with the water and vinegar spray. Leave it for 5 minutes to soak into the grout.
Mix 1 cup (180 g) of baking soda and ½ cup (125 mL) of water in a bowl. Measure the baking soda and water into a small bowl. Use a spoon to stir them together until they are fully combined and form a paste. If you are cleaning a very small area, halve this recipe.
Scrub the paste into the grout with a grout brush. A grout brush is a thin brush that is designed to easily remove the dirt from between tiles. Dip the brush into the baking soda paste and then scrub it over the tiles until all the dirt is gone. Use a scrubbing brush or a toothbrush if you don’t have a grout brush.
Spray the vinegar solution over the areas that you have scrubbed. The vinegar will mix with the baking soda paste and start bubbling vigorously. This chemical reaction helps to dissolve any remaining dirt and grime from the grout. Spray enough vinegar solution to completely cover the baking soda paste.
Use warm water and a dishcloth to wipe up the baking soda and vinegar. Dip a clean dishcloth in water and then squeeze it to remove any excess water. Wipe up all the baking soda and vinegar paste from the grout. Rinse your cloth after each wipe to avoid spreading the baking soda over the glazed rustic tiles. This also helps to remove the vinegar smell from the grout.