You can use a simple grout removal kit or i prefer using a dremel 568 grout removal kit which attaches to my dremel tool or the rockwell sonicrafter.
How to fix cracked floor tile grout.
There are a few probable causes but before you tear up the tile and start over try this quick cracked grout fix.
Dealing with cracked grout is a common issue that comes up for many homeowners at some point.
4 spread the grout and completely fill the cracks using a grout float.
In order to repair damaged grout that s cracking using new grout follow these steps.
Is the grout between your floor tiles cracking or worse crumbling away.
Once the grout cracks for any reason it s time to repair broken grout before there is any damage to the surrounding tiles.
Repairing wide cracks in grout.
Therefore learning how to repair cracked grout can be an essential skill to learn.
Mix the new grout with water in a small container.
This will loosen any cracked and damaged grout.
If you have wider cracks in the grout or missing grout then it s time to consider removing the old grout and installing new grout between the tiles.
Use a vacuum with a hose attachment to clean out any excess loosened grout.
A cup or bowl should work fine.
While grout may crack from wear and tear an uneven or weak subfloor.
Use a bamboo skewer and drag it along the grout line.