How to clean grout without expensive grout cleaners

Grout is not easy to clean and many solutions don't actually work when it comes to it. So here is the best and the simplest solution that you can make at home, that will make your grout sparkling clean and will save you money and time.
You will need: bleach, baking soda and an old tooth brush that you could dispose of later. Mix equal parts of bleach and baking soda ( it should look like a thick paste) and work the solution in with the tooth brush. Then leave it there for 15 minutes. Scrub it a little more and leave again for 5 minutes. Rinse the area very well. Then let it dry. Enjoy the result :)