Flooring Tile - grout coffee stain

Help! Recently had DuraCeramic tile put in kitchen. Unfortunate "accident" with the coffeemaker. (Ok, I'm an idiot. Prepared the coffee for the next morning, forgot to put the pot under the filter yet still pressed the timer button. Coffee brewed automatically without the pot to catch it. You can only imagine the mess.) The grout now has some coffee stains and I've tried everything recommended by Congoleum to get out the stains. The 10:1 bleach solution seemed to work temporarily -- grout was white immediately. When I came back about 30 minutes later, the stains were back. Other than having the floor regrouted, any other suggestions? Thanks!

Was this grout sealed? You could try a mixture of white vinager and water (50/50).

Hold on for a bit, and I'm sure one of our pro's will chime in.

Duraceramic is not real ceramic tile, and their grout is not really grout. Id suggest contacting them again and seeing what else they might suggest. Short of that, remove the grout and replace it.