Here’s a very simple recipe for cleaning tile & grout with almost no effort.
Tile and Grout Cleaner
1/2 cup baking soda
1/3 cup household ammonia
1/4 cup white vinegar
7 cups warm water
Combine the ingredients in a one-gallon plastic jug, cover, and shake or swish it around to mix it well.
Fill a spray bottle with the solution, spray directly onto the tile surface, then wipe with a damp sponge. Alternatively you can mop a tile floor with this as well.
Yield: 2 quarts. Do not mix this cleaner with anything containing bleach.