Restaurant Degreaser Mopping: Restaurant Grout?

Mopping: Restaurant Grout? - restaurant degreaser

I work for a fast food restaurant rather than age, we have another camp next year built. My question is rake in color / gray blue in the mortar, "how can I avoid this? Tops are dark brown, the grout is black and the bottom is not in terrible conditions. We use green scouring often in restaurants MOP water and rubbed the bridge regularly and have tried different amounts of degreasing. floorings search using aweful though lately. Besides the gray mortar, food gets stuck in most cases the grout, too. I'm very particular history in restaurants, work, and what bothers me . Thank you!