Mix equal parts water and hydrogen peroxide in a spray bottle and spray onto any stains.
Clean grout from slate floor tiles.
Your grout is probably discolored by a gradual buildup of dirt and grime.
Spray the solution on the grout and let it soak for about ten minutes.
Porous tiles especially a stone such as slate need up to two or three applications of a special grout release.
Try using a grout haze remover which is available at tile stores.
Grout cleaning is the toughest part of cleaning any tile floor whether you have mexican tile slate ceramic travertine granite porcelain or terrazzo getting that grout clean this is because the dirt in there is usually untouched by mops and household scrubber vacuums.
Protect your hands with rubber gloves and dip your cheesecloth or terry cloth in water.
Grout cleaning is the toughest part of cleaning any tile floor whether you have mexican tile slate ceramic travertine granite porcelain or terrazzo getting that grout clean this is because the dirt in there is usually untouched by mops and household scrubber vacuums.
Grout is worked into the space with a damp sponge and the remainder of the grout is cleaned from the surface.
Tile and stone sealers will work sometimes but not always.
It s not always effective on slate however.
Don t worry you can bring back the brightness of the grout by using a 50 50 solution of water and hydrogen peroxide.
Wring thoroughly as too much water can damage.
Remove grout haze with water and cheesecloth.