Help! I came back from a 6-month overseas trip and noticed my toilet floor tile's grout have random brown patches. I tried to scrap off the top layer of the grout (noticed the brown stain went further down), and covered with fresh layer of grout, hoping to cover the ugly discoloration. But to my horror the next day, the brown Colour surfaced!! Even though I didn't use the toilet at all. Can anyone give me some good advice on what had happened? Is there a good tiler to recommend to do an assessment and possibly repair work? Thanks!! Lee
