Here are the gross before pictures of our shower grout:
The magic of the Interwebs recommended Woolite foaming carpet cleaner, but I only had Woolite pet spray carpet cleaner.
You should see how clean the shower tiles look now! I didn't even let the Woolite soak in very long, I just sprayed it on, scrubbed it with a hard bristle brush, and voila!
The after photos:
I was so impressed that I rushed to the store to buy another bottle to clean our kitchen floor.
I was not paid for this blog entry. These experiences are my own and I wanted to share them with you.