My subway tiles are white and the grout in between is old and
yellow from the shower water.
Mr. Clean or Spic and Span.
Sealers fill the grout's pores, preventing grime, grit and mold from infiltrating the porous material.
You'll cut future grout-scouring time by half (or more!) if you keep a small squeegee or a clean microfiber cloth near the shower, to quickly wipe down the tiles after you turn off the water. Tell your family to open a window or run the exhaust fan for 10 to 20 minutes after a shower as well, to quickly pull humidity and moisture from the room and help prohibit mold growth on the grout.
Here are a couple ideas for you.
Lysol Lime & Rust Remover Toilet Bowl cleaner, comes in a black squirt bottle. Scrub with Scrub Daddy or Mr. Clean Magic Eraser. If stubborn, use a scouring stick to scrub. Once clean, seal.
If you can't get it clean and bright enough, paint with either grout paint or exterior paint. Then seal.
Ideas from other Hometalkers
Hello! Heres some other recommended cleaners
The Best Way to Clean Grout-EVER!!! | Hometalk
Painted Tile Grout Refresh with grout pen
Grout cleaning and grout removal and replace it
Here’s a Hometalk link for you to consider. Hope this helps
Hi Mimi - This is the shower cleaner that we use to help keep grout and tiles clean and minimize the mildew - it works on kitchen grout too. I've also included a great article about mold if it's gone that far. Hope this helps! Hugs, Holly
PS - We have a FREE eBook with recipes for all of my homemade and all-natural cleaners. You can download it here --> https://pinkfortitude.com/thank#GreenClean