I could do with some ideas on solving a problem which drives me up the wall! The floor tiles in our kitchen are 600 x 600mm. One of them loudly creaks when you stand on the corner of it, and of course it is in a part of the kitchen which regularly gets walked on. I don't want to try lifting it because there's a very good chance that it will chip or break and no one makes them any more. There is a very fine hairline crack in the grout around the tile, and i know that the tiles are really wells stuck down onto a concrete floor. I do have some spare grout which is a perfect match. I'm thinking of injecting glue PVA? into the crack with a hyperdermic needle and letting it dry. Next door is an A&E doc so no bother to get these without appearing to be a junkie Any thoughts/wise ideas from the collective?