In a spray bottle, mix 4 tablespoons of baking soda with 10 centimeters of white vinegar. The mixture will start to foam like a mini volcano: don’t worry, this chemical reaction is completely normal.
Spray the baking soda and white vinegar mixture onto dirty tile joints, then let the product sit for 24 hours until it can work.
Scrub your joints with a toothbrush or sponge, rinse them with water and admire the result!
Good to know: to prevent fairly exposed tile joints (in the kitchen or bathroom, for example) from getting dirty too quickly, you can cover them with a tile joint varnish that will protect them from stains and moisture.
