Thank you both. I read all the fine print on the grout cleaner Mosesco mentioned, but I have to admit, it made me too nervous to use on sealed granite. I also tried to get the contractor back in to clean his mess, but he wouldn't do it. Instead he suggested I get some muriatic acid and a stiff scrubbing brush and gloves and scrub it off. That, too, gave me pause. Thus, my post in the first instance as I was hoping there was another solution. Of course, if the contractor isn't off base with the muriatic acid recommendation, then the solution posed by Mosesco probably would work in the same manner.

Our new home is nearly finished. I notice some grout sealer on the wood piece that encloses the refrigerator. Also some remaining grout sealer on the porcelain tile. Any suggestions for removing the grout sealer without damage? TIA

This may be an old post, but I have solved my problem, it may solve yours as well. I used CEG lite grout, from Home Depot where no one knows what the hell they are doing since HD fired the older employees that did know and replaced them with $9 an hour employees. I had installed the grout as directed. no matter what they said I still had grout haze in some spots. After research I found nothing that helped, the vinegar and water didn't work, nor did elbow grease. My tile is matt finish and the expoxy haze was shiny with a few 'lumps' that needed to come off. The grout had been on the tile less than 48 hours, so keep that in mind. I used lacquer thinner to remove it with a clean white terry cloth. I put a little lacquer thinner on part of the cloth and started wiping it up. It wasn't hard, but I was judicious in trying not to get it directly on the grout lines.

Hello mailynn , I think that this product can help you, Any way you can find more information and the entire product in the link Here is a link that might be useful: Tile & Grout Care kit