![Any idea what happened with this grout? Brand new build, new shower floor, not used and completely dry. I tried scrubbing with Oxiclean, no effect. Thinking of using a grout pen to Any idea what happened with this grout? Brand new build, new shower floor, not used and completely dry. I tried scrubbing with Oxiclean, no effect. Thinking of using a grout pen to](https://preview.redd.it/any-idea-what-happened-with-this-grout-brand-new-build-new-v0-vkp0r7cp8rma1.jpg?width=640&crop=smart&auto=webp&s=ac892d72e21cfc71e8ba074685ae74d83d7a21f6)
Any idea what happened with this grout? Brand new build, new shower floor, not used and completely dry. I tried scrubbing with Oxiclean, no effect. Thinking of using a grout pen to
![Amazon.com: CHOMP Grout Cleaner And Brightener, Powerful Tile Floors Cleaning, For Showers, Bathrooms And Kitchens, Includes Easy Scrubber Grout Cleaner Brush To Refresh Grout, Remove Stains 1 Bottle x 32 Ounces : Amazon.com: CHOMP Grout Cleaner And Brightener, Powerful Tile Floors Cleaning, For Showers, Bathrooms And Kitchens, Includes Easy Scrubber Grout Cleaner Brush To Refresh Grout, Remove Stains 1 Bottle x 32 Ounces :](https://m.media-amazon.com/images/I/61K2SjJyceL._AC_UF350,350_QL80_.jpg)
Amazon.com: CHOMP Grout Cleaner And Brightener, Powerful Tile Floors Cleaning, For Showers, Bathrooms And Kitchens, Includes Easy Scrubber Grout Cleaner Brush To Refresh Grout, Remove Stains 1 Bottle x 32 Ounces :
![How do I get grout clean again? Previous tenants never cleaned it. I have tried kaboom, scrubbing bubbles, comet, everything. Help! : r/CleaningTips How do I get grout clean again? Previous tenants never cleaned it. I have tried kaboom, scrubbing bubbles, comet, everything. Help! : r/CleaningTips](https://i.redd.it/yftxb02gn8h71.jpg)