Clean the damaged grout with white vinegar and water.
How to fix ceramic tile grout.
Scrape any excess grout from the tiles using the edge of the grout float.
Once it s semi dry wipe your tiles using a sponge dampened with tap water.
Use a spray bottle and some cold water to wet the areas where you removed the grout.
If the space is larger than 1 8 of an inch use a sanded grout.
Just allow the area to dry for 2 to 3 more days and its true color will show to match the color of the old grout perfectly.
This fix is only practical for interior tile floors and when the gaps between the tiles are 1 4 in.
That way you can see the exact color of the grout and buy new grout that matches it.
Measure the space between the tiles.
Mix one part white vinegar and one part water in a bowl or bucket.
Use a grout saw to remove the loose or damaged grout in between the tiles.
Be extra careful with this step as you can scratch or chip.
If the width is 1 8 of an inch or smaller use an unsanded grout.
1 clean the area where the grout is broken with a 1 to 1 vinegar and water mixture.
Wipe this mixture over the tile with a.
Use a dry rag to polish the tiles.
Step 3 clean the seams.
Wet an old rag and clean the surface of the tile for more grout smudges.
Match the caulk at most tile specialty shops you can get or order sanded caulk most floor grouts are sanded that will closely match your existing grout color.
When a hazy layer appears on the tiles you can buff them clean using a dry rag or microfiber cloth.
If the cloth doesn t remove the haze mix 1 part white vinegar with 1 part water.
Never use sanded grout with metal glass or marble tiles.
Be careful to avoid damaging the tiles.
The color of the grout will initially look a shade darker than the old grout.
Then dip a clean toothbrush in the mixture and scrub the damaged grout until all the dirt and grime comes off.
Give the new grout about five minutes to sit.
Step 2 remove loose and damaged grout.
Gently run the grout saw back and forth along the grout seams.