Tiles and the gaps between them should be prepared before grouting. The source emphasizes removing dirt and installation residue so the joint material can be applied properly. Check for adhesive on the tile faces and within spaces intended for grout.

Clean Tile Joints before Applying Fresh Grout

Use tools compatible with the tile finish and follow the adhesive and grout instructions for timing. Avoid damaging edges while clearing a joint. Good preparation supports a cleaner finished result and is easier than trying to correct embedded debris after the material has hardened.

Residual adhesive and loose dirt can interfere with a proper application.