Professional cleaning can substantially improve grout darkened by removable soil and buildup, but cleaning cannot repair cracked, missing or permanently discolored grout. The condition of the grout determines how much restoration is possible.
Soil can be removed. Cracks and missing grout need repair.
Porous grout absorbs soil and mop water.
High-pressure rinse and extraction clean deep into grout lines.
Some staining is in the grout itself.
Cleaning first shows whether repair is needed.
See What Your Grout Can Look Like: 410-979-2355