Obviously the inventors of this stuff have realized that no amount of scrubbing will clean grout, so painting it becomes the next best option. The pen is like a big white highlighter with a white paint that readily covers the grout.
home improvement (and repair)
How To Make Your Own Bleach Gel PenOne Good Thing by Jillee | One Good Thing by Jillee
I used a grout pen to make my kitchen grout grey like this. It really makes the white tiles stand out. Can't wait to add some more hints of grey like this
Make grout stains disappear! Tiled areas in your kitchen and bathroom will look beautiful again by covering stubborn stained grout with this odorless, water-based liquid. No scrubbing or toxic bleach!
Stuff to try
Grout Pen Dark Grey - Ideal to Restore the Look of Tile Grout Lines - Grout Pen Gray - Amazon.com
How to safely make your own bleach gel Ingredients • ¾ cup water • 3 Tbsp corn starch • 4-7 Tbsp household bleach
Clean Grout With a Bleach Pen. I did this today and I was so surprised with how well it worked! My only complaint is that you need a lot of bleach pen to do and entire bathroom. -Samantha
Holiday Sparkle: FINALLY CLEAN YOUR GROUT!
Keep it clean
The Miracle Grout Pen Test, Before & After!! Totally doing this on a weekend in the shower
Handy Things to DIY
We Tried It: The Miracle Grout Pen Test, Before & After | Apartment Therapy
So Fresh and So Clean-Clean