We had Ann Sacks Penny tile installed in our bathroom last year and now have several areas where the grout has become dirty looking.
I've tried everything (and believe it was the fault of the men who returned to regrout areas that had cracked after installation and did not mix the new grout properly) and am wondering if anyone has ever used grout colorants.
I know it would be a beast of a job but we don't want to rip up the entire floor. Thanks! Blackbird