The pinterest post said 1 part Dawn to 2 parts peroxide. This really works well, but I had so much soap suds from the Dawn, it was impossible to wipe clean. This bucket is full of suds after changing the water at least 10 times. WAY to much Dawn. I even kept adding more peroxide, but the Dawn suds are just too potent. lol
If I do it again, I will do 1 part dawn and about 4 parts peroxide. Like I said before, it works really well, but the soap suds are out of control.
This is a pic of the difference in the grout lines when I had finished one area.