It is hard to enjoy getting clean when your bathing area is dirty. If you have dark mildew growing on the grout between tiles in your bathroom, you can remove it and any stains it leaves behind.
To remove the dark mildew growing on the grout between your bathroom tiles, create a paste out of two parts baking soda, one part borax and one part hot water. Apply it to the mildewed part of the tile and grout and allow it to sit for 15 minutes, and then scrub it away with a soft brush. Rinse the area with hot water.
If stains discolour your grout even after the mildew has been removed, bleach them away. Add bleach to baking soda until it creates a thick paste, and smear it on the discoloured grout. Let it dry, and rinse the area thoroughly, according to "Talking Dirty with the Queen of Clean" by Linda Cobb.
When working with bleach, be sure to ventilate your bathroom well. It is a good idea to remove all fabrics and linens from the room because bleach fumes can alter their colour. To prevent mildew from returning to your grout, install an exhaust fan in your bathroom and run it whenever the shower is in use, according to the book "Knack Clean Home, Green Home" by Kimberly Delaney.