Having got toally confused by the range of products available to sort out grout - colour reviver, grout cleaner, grout colourant, grout sealer to name a few I retreated to the local supermarket and spent £3.49 on some olive oil and applied it to all of my grout! Amazing - all nasty patches and white residue completely gone and the floor now looks fantastic, a unfiorm mid brown grout enhansing the tiles and it looks very expensive seeing they were only Wicks tiles in the first place!!! Would certainly say it is the best result achievable. THANKYOU FOR ALL YOUR HELP....
