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.

Very good tip. I use those thing all the time in my work.

There are a lot of sealant removal products in the market, you should read the label of the sealant to find out if the manufacturer has a sealant remover, it's recommended to use the same sealant manufacturers sealant removal product. You can also contact them and ask them what they recommend if they do not sell a sealant remover.

Okay, so I've tried a couple of acidic products from Home Depot and I still got grout in my tiles. I can now safely say that it is not haze but grout stuck in the pits of the tile. The tile is not flat and smooth but has a sort of pitted-like surface and the grout is stuck in the pits. The two products I tried were a glycolic acid product and a sulfamic acid product both with no luck. Seems the only thing that works is to pick the grout out with a sharp object but that is going to take be months to remove it from all the tile. Does anyone know of other products or options here? Any help is much appreciated.