I have been shopping for new bathroom floor tile and find that I like what I have better than what is in the store. The problem is not the tile, but the grout which is wide and discolored here and there. I wish the grout lines were thinner but I can live with if I could clean the grout up and seal it The grout is darkish grey and has a few white spots on it but won't scrub out. At least not with scrubbing bubbles and a brush. Obviously the last step would be to seal it, but what are my options now? Chisel it out and re-do, file down the few spots and patch with grout (I still have the original grout, but it might not match the been-there-for-a-while grout) "paint it" with grout colorant? My hubby would be so happy if we didn't have to pay for new tile too.