Marvelous! Thank you, dlbkelly_cfl_rr_com and the rest! I used Bostik Dimension diamond urethane grout which I’d used before with little issue, but I apparently waited too long to wipe AND since I had varying tile thicknesses this time -- I had the clever and time-consuming idea of combining 3 different styles/brands of tile sheets -- there was more residue to clean off. My glass -- regular, polished and frosted -- and stainless/polished steel mosaic tile looked horrid. Sadly, I used the manufacturer’s suggestion of Windex and that made the area’s grout I tested just a tiny shade of bluish white instead of brilliant white - only noticeable to me but still annoying. A half-vinegar/half-water concoction worked with the bulk of the thinner residue and I finished off the thicker bits with a razor blade/glass scraper (only on the glass); the glass scraper was necessary for the frosted glass tiles but I will go over it again with a pumice stone or magic eraser as was suggested elsewhere for matte tile. The brushed stainless tiles are giving me a hard time and the polished metal tiles did get scratched by the grout/ocelo no-scratch scrub and wipe sponges but a huge improvement! If this hadn’t worked, I’d have to run out and get the Bostik Blaze which is also good for urethane grout haze clean-up.

The tile guys at the John Bridge Tile Forum will be your best source of help.

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.

First of all I'm really sorry about my double post (also under "taking shine off porcelain tile") - this is my first time posting and I was a little confused! Thanks so much for your responses. The thing I'm worried about is that I called in the order for the matte sample I'd seen and they wrote up the order for the glazed version of the tile - I then ok'd the order over email, because all that was listed was the tile number, which I had no way of knowing was different from the sample (there was nothing that said 'glazed' or 'shine'), especially since I didn't even know there was any other finish available for the tile. So technically, I ok'd an order for the glazed. Also, I don't think they'd pay for the demo and installation, since wouldn't they only be responsible for the tile price itself?? So frustrating. Any thoughts? Also it looks like Bill V. responded to my other post, so thanks for the tip and for the forum link. I'll keep you posted!