If so try these tips for removing them.
How to get grout off ceramic tiles.
If it is a just a few spots and your floor tiles.
Wet grout is easy to wipe away with a damp sponge but because it is comprised mainly of cement it can be very difficult to fully remove dried grout from porcelain tile.
If you have yet to remove all the grout haze continue to method 3.
If your tile is porcelain or ceramic try a vinegar solution to remove grout.
Excess grout can mess up a ceramic tile job.
In some cases you can enlist vinegar.
No special chemicals or solutions are required.
To avoid excess grout use a release agent on the ceramic tile.
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.
By applying water to the surface it will soften the grout and make it easy to scrape and wash off.
How to remove grout and cement spots off ceramic tiles.
Cleaning grout off tile with vinegar is safe and efficient for ceramic and porcelain tile installations and grout but acid cleaners should never be used on porous or stone tiles which includes vinegar and rubbing alcohol.
Have you got extra grout marks or tile adhesive spots on your recently renovated bathroom.
Vinegar won t leave any residue behind which some harsher detergents can be known to do on tile.