It's been a couple weeks and I decided today was the day for grout. Not a good start. For some reason the cold water supply to the washing machine didn't actually shut off when I closed the valve and cracked the hose loose. Water sprayed all over the wall and about a half gallon of water went everywhere before I could get the hose secured again. Tapping the water hammer gizmo at the valve allowed it to close, but the corner to the lower left of this pic is really wet.

I'm gonna grab the Shop Vac for the rest of this and vacuum while I'm cleaning out the grout lines. This is making a mess.