Shout your grout!
Trying to clean up a pet urine stain in my laundry room - grabbed my spray bottle of Shout! stain remover for fabrics, sprayed it on the tile and grout and mopped with clear water. No scrubbing came up really clean. I rinsed about five times just to be sure to get it all up in case the pets wanted to have a sniff. Tile and grout look perfect, and a bonus: My string mop looks great too!