it's possible there may be remaining tile adhesive residue stuck to the wall or floor. Use an adhesive removal spray, such as WD-40 or Goo Gone to loosen the glue. Let it sit on the surface for a ...
To start cleaning your tile, remove the old grout and any adhesive from the back. Use a grout removal tool or a putty knife to scrape away the old material without damaging the tile. If the ...