This video on how to clean your grout lines is pretty straight forward. Apply chemicals, scrub, then mop. What's unusual is the solution that is being used is a mixture of hydrogen peroxide and baking soda. These to product mixed together release a lot of oxygen and can easily do the job. The only problem is that a lot of scrubbing is required to get the embedded soil out of the grout lines.
Grout is a porous substance made out of sand and binding materials that hold it in place. As soil and debris are tracked onto grout it starts to get embedded in the grout itself. A lifting agent is required to loosen the soil allowing it to be removed. In the video Hydrogen Peroxide and Baking Soda are mixed together to make the lifting agent. This worked well at emulsifying the soil but still required a lot of elbow grease.
There is an easier way to clean your grout lines. As a professional tile and grout cleaner in Tampa FL I've heard about a lot of home remedies to clean grout, and almost all of them require a lot of scrubbing. There is only one home cleaning solution that I would recommend and it does not require any scrubbing.
Mix equal parts of water vinegar and an oxygen bleach into a paste and apply it to your grout lines. Let it sit until it dries and then mop it up with some water. This will remove most of your stubborn grout stains. If you like are a big fan of scrubbing go on and scrub til your hearts content. It can't hurt and will surely get your grout cleaner.
If your looking for more tips on how to clean your grout Tampa FL check out www.tampascareptcleaning.com.