In some cases you can enlist vinegar.
Chemical to remove grout from tiles.
To purchase this chemical for grout removal consult your local hardware store or building supply store.
Scrape off large chunks.
Don t mix the vinegar with baking soda or any other cleaners or it could cancel out the cleaning properties of both ingredients.
Sugar water method.
Muriatic acid a form of hydrochloric acid is a tool brick builders sometimes use to remove mortar.
Fill a spray bottle with half vinegar and half water.
The acid free formula is safe for ceramic marble and porcelain tiles.
If dried grout reside does harden onto the tile you can try to remove it using vinegar a chisel or a diluted sulfamic acid solution.
Pour some white vinegar on an abrasive sponge and wipe the grout lines roughly to lift dirty or black residue.
When that day comes remove the grout and replace it to rejuvenate the installation and make the surface gleam.
If you have yet to remove all the grout haze continue to method 3.
Mix 1 cup of white granulated sugar into a gallon of hot water.
Stir until the sugar fully dissolves.
Spray the tile and allow the solution to sit for a couple of minutes before wiping it away with a clean cloth.
Use white vinegar to clean stains out of the grout between tiles.
Grout is incredibly porous like a giant sponge which means it will absorb any grease grime oils or spills it comes into contact with says leslie reichert green cleaning coach and author of the joy of cleaning and while the culprit may vary from room to room mildew in the bathroom cooking.
If your tile is porcelain or ceramic try a vinegar solution to remove grout.
In a bucket mix a gallon of hot water with a cup of granulated sugar mixing the two until the sugar dissolves in the water.
To use you spray it on wait for one to three minutes then use a brush to loosen and rinse it off.
Pour the solution over the grout or apply it to vertical surfaces with a sponge.
The same or stronger chemicals can be used to remove grout.
It can also be used with a grout steam cleaner for extra cleaning power.
Cleaning grout off tile with vinegar is safe and efficient for ceramic and porcelain tile installations and grout but acid cleaners should never be used on porous or stone tiles which includes vinegar and rubbing alcohol.
Sugar and water method.