Tile and stone sealers will work sometimes but not always.
Clean grout from slate floor tiles.
Your grout is probably discolored by a gradual buildup of dirt and grime.
If you fail to thoroughly clean the slate tile surface after grouting the grout can.
It s not always effective on slate however.
Protect your hands with rubber gloves and dip your cheesecloth or terry cloth in water.
Wring thoroughly as too much water can damage.
Remove grout haze with water and cheesecloth.
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.
Try using a grout haze remover which is available at tile stores.
Don t worry you can bring back the brightness of the grout by using a 50 50 solution of water and hydrogen peroxide.
Cleaning the slate is easy but now you have to clean that grout.
Let it sit for five or ten minutes then scrub with a soft scrub pad not steel wool or a soft bristled.
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.
Mix equal parts water and hydrogen peroxide in a spray bottle and spray onto any stains.