I can't delay any more. I want to, but I can't. It has to be re-done. So Ive checked online, and read what I can, and I think I can do it. Chip out the old grout, spray with bleach water and let dry, smush new grout inbetween tiles, sponge the grout off the tile, and voila!! new grouting. Anyone have any tips on how to really do this? Im stressing a bit about this. I guess a trip to Lowes is in order this weekend, but I want to be sure I buy exactly what I need.