1 If the mold or mildew is stubborn, you can add another 1/2 cup of bleach or vinegar to your mixture. 2  You can also spray the tile and mold with Shout. 3  Let it sit until it wipes off easily with a towel or rag, and rinse with water. If the mold or mildew is stubborn, you can add another 1/2 cup of bleach or vinegar to your mixture. 2  You can also spray the tile and mold with Shout. 3  Let it sit until it wipes off easily with a towel or rag, and rinse with water.