There are a few good reasons why you might want or need to remove old tile grout.
How to remove tile grout off walls.
The old grout might be moldy and beyond cleanable.
Use the scraper to clean off large debris and then clean off any soapy residue with a damp cloth.
If you are grouting ceramic or porcelain wall or floor tiles it can be easy to leave small lumps of grout on the tiles surface and around the joints.
An ordinary grout saw typically does not work for wall tiles because of lug spacers that connect adjacent tiles underneath.
Use a ball peen or masonry hammer and cold chisel to tap the pieces free.
Always wear safety glasses when removing ceramic tile.
How to remove grout.
When remodeling a bathroom or kitchen the hardest part can be removing the grout from pre existing tile.
In some cases the only way to tear out the ceramic tile is with heavy equipment such as a jackhammer or air chisel.
Cleaning grout when hard how to clean off and remove grout from a tiles surface that has gone hard.
Fortunately there are a few methods that can help to remove even the most stubborn dried on grout from tiles without damaging the finish of the tile.
Scrape the grout away with a utility knife.
Wipe the tile dry with a clean towel to make sure all grout is removed.
Armed with this handy tool you can remove 15 square feet of grout on 4 by 4 inch tile in about one hour.
If some grout remains repeat scrubbing it with the sugar water.
Grout is made from water cement and sand which hardens over time to form a rock like material.
Fit your utility knife in a sturdy holder if you have one and run it carefully and repeatedly around the tile or tiles you plan to remove.
Begin by giving the tile a good cleaning with a sponge and soapy citric acid water as adescaling solution and use a toothbrush to deep clean grout to remove deposits and stains that may make removal more challenging.
This method takes a while but comes with a low risk of damaging the surrounding tiles.