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Unread 09-01-2007, 04:24 PM   #2
Davestone
Florida Tile & Stone Man
 
Join Date: Apr 2004
Location: Naples Fl.
Posts: 22,690
You need a commercial type soap and scum remover,and maybe even a steamcleaner or high pressure extractor machine. But first try a soap and scum remover from HD or Lowes,or online, and your grout brush,then if that helps a cleaning with some sulfamic acid crystals and the grout brush oughta bring back the original color, then rinse,let dry, and seal.
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http://Davestonestile.com
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