I tried the the baking soda/peroxide/Dawn mixture, and it was a nightmare getting the baking soda rinsed off. Instead, I put the peroxide in a spray bottle with a teaspoon of Dawn. I waited five minutes and scrubbed it off. That worked just as well, and it was easy to rinse off.
Originally Posted by
Rose_P
Thanks, JENNR8R. That looks good and has the extra benefits of being inexpensive and non-toxic. I might be up to doing a few square feet a day, and by the time I finish the whole downstairs, the area I started with will probably be ready for the next round. I think I'll probably go with the Grout Refresh because getting a darker color would be a more permanent solution. However, it would be a good idea to get the grout as clean as possible before starting that process, so the baking soda and peroxide formula will be good for that.