Oh my gosh! Who has a constant struggle with their grout in their lives? For years I have HATED my awful grout lines in my bathroom and kitchen. It was dingy and looked so nasty.
I hated my kitchen grout I even had an estimate to replace the whole floor. You know.....when the lack of funds gets in the way of my decorating, its NOT right! I tried bleach, I tried every grout cleaning product on the market. Like a good Pinterest follower, I looked up all the tips. Nothing really worked. I even mixed up a good 'ole batch of hair bleach and peroxide to brighten my group lines. To my surprise that didn't even work.
I was so excited when I found this product at @homedepot . The product is Polyblend Grout Renew!!! Click (here) for link. There are roughly 8 colors to choose from in the store itself. I actually purchased two (#10 Antique White & #180 Sandstone) to blend together to better match my current tiles. The price at Home Depot was between $16.99-$17.87 each at the time.
These were the steps I took to a better relationship with my nasty grout lines:
I scrubbed my floors with a quality scrub brush on my hands and knees. I just used a little bit of water & vinegar to ensure there were now crumbs, dog hair or my long human hair remaining on the floor.
I poured a little of the Grout Renew product into a disposable bowl. I used very little so I would only pour small amounts as I went along and needed it. I took a small paint brush and simply just started painting my group lines. It is fairly easy project. Don't worry too much if you hit a tile, it easy wipes away. I tried to wipe as I was going along so I wouldn't have that big of a job later. Let it dry.
Wipe up any messes that you see on your tile. I used a little razor blade in places where I may have made a mess on the tile itself, but because I tried to do this in small sections and clean up as I went along, there wasn't much of this to be done. And Voila! Brand new grout lines that make me happy!