I use vinegar, but am sure the alcohol is fine. I've read with vinegar to remove it as it will damage the grout. I never do, just forget. I'm sure the givee will love it for many, many years.

I use vinegar - cleans the grout film off the tess and brightens it all up. Then, if I want a glossy finish to the grout, I use Tile Lab glossy sealer.

vinegar mixed with water and in a spray bottle. Ditto what Slow said.

Me too!!!Wh slow said