Remove joint mortar with Bref after tiling
Against dirty tiled tiles, there's the wonder weapon: Bref (the one in the red spray bottle)! Simply spray "Bref" on the tiles (it should be a manageable area, otherwise it will dry too quickly), then foam well with a sponge or scrubber and then scrape off with a "scraper" (for glass ceramic or wallpaper scraper), then wipe off with a wet cloth , then wipe with a dry or dry cloth - really helps better than the expensive cement film remover from the hardware store, with which we scrubbed 2 Saturdays à 8 hours three or four on our knees and my sister before moving into the new house probably already had nightmares ;-)
