Fit the oscillating tool with a blade specially intended for removing tile grout.
Removing old grout from wall tiles.
If you have wall tile with too much grout then soak paper towels in the solution and place them on the tile.
Allow the tiles and grout to completely dry.
Use the scraper to clean off large debris and then clean off any soapy residue with a damp cloth.
Take the water and sugar mixture and pour it over the grout that needs removed.
Start by holding the tool horizontally or vertically in the case of vertical seams turning on the power and lightly pressing the blade to the grout.
Taping will help to stop you from sawing into the tile as you cut up the grout.
Insert the triangular tip of the grout scraper into the incision you made with the grout saw.
Then using some fine wire wool rub gently over the grout which will begin to dissolve and rub off at the same time.
Tape the tiles so that the grout joints are all that is visible.
Take one gallon of warm water and dissolve a cup of sugar into it.
The basic method for hardened grout removal use warm water and wipe it over the surface of the tiles with a sponge.
Using a wooden paint stick gently scrape at the grout removing the larger chunks from the surface of the tile.
Remove the grout from between the pieces of tile with a grout scraper using the incision as a starting point.
Once the tile is clean and has no more hardened grout wipe over with a damp cloth and leave to dry.
Apply firm pressure and drag the scraper along the grout line about the length of one tile but be very careful to avoid scraping the tile.
To do this use the grout float again this time holding the tool at an 80 degree angle to skim the excess grout from the face of the tiles.
In concert with the grout float a large damp sponge.
Scrub the mortar with a scrub brush to remove the residue the acid has loosened.
Remove a piece of tile from the solution.
Take this sweet solution and pour it onto excess grout on a floor.