Grout dried grey instead of dark brown - tried haze remover
We had our porcelain tile grouted a week ago and the grout had dried light grey instead of dark brown.
We have washed the area with soap and water, plus have used a HD haze remover. No luck, the grout is still grey.
Can you suggest the following:
1. why this happened?
2. what we can do to fix is as we don't want our tile guy to have to re-grout.