What's the best approach to verbs grout dirt? I've just had installed stoneware tiles for my kitchen and bathroom floors....

I've just had installed stoneware tiles for my kitchen and bathroom floors. The grout is dirty even black in some spots, and nothing I do turns them white again. (we used white colored grout) I started scrape one part with a metal tool and it get white but I think that was the grout I be scraping out. Thanks guys for any advice. I repugnance dirty floors!
Answers:    unfortunately when grout gets dirty, at hand isn't usually a fix all solution for it. grout is going to get dirty, whether it is hermetic or not and whether you clean every day or not. (i don't blame you, i hatred dirty floors too!) the one thing you have going for you is that you used white grout. i don't instinctively agree with putting white grout on the floor, but to each his own. :) stop scrape the grout. it may make the grout look white again, but you are weakening the grout by scrape it out. your solution is to scrub your grout with bleach and water. a toothbrush or a deck scrubber brush would do the trick. that should oblige to get it white again, but it won't stay white unless you stay on top of it. surrounded by time you may have to have the floors regrouted if the bleach harms the grout. the bleach thought wouldn't have worked if you chose a darker grout, though a dark grout hides more dirt. a carpet cleaning company should hold out a grout cleaning service. you might consider pricing them first and see if that works before you tackle the bleach scrub. good luck!
Use a professional stength grout cleaner..not the stuff at Home Depot or Lowes...Look at the link within the source line..I bought cleaner and a brush from there and it worked great. Try using everyday laundry bleach...