Astro- the grout cleaner I recommend is a chemical called tile plus you can only get it from godfreys stores I think..? you use it like 16ml to a litre and leave on for 10 mins then mop off (steam mop off) works wonders! Brings them and the tile up like new! Oh and use it with a grout brush (a very hard bristled brush) for better results hope that helps


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