Any good tile cleaner from your local Topps tiles, or Tile giant will do. The only thing is sometimes the gypsum in the plaster will stain and you wont get this off. [/quote ]the way i would do it is with a chemical called pro clean you can buy this on the tile doctor website follow the instructions and that will do the job
Lots of little ones, they do seem to be fading, but slowly.RegardsCliff