haze on tile

The grout seems to be ok, it has sunk in some places. My biggest concern is the haze on the tile. What can I use to remove it and not damage or discolor the grout/

What type of grout was used?

Prism grout

The haze I am used too can be buffed off with a dry rag or mopped up with damp sponge. Is it a dry mix (from a bag) sanded or unsanded grout, or epoxy?

There is a grout haze remover you can buy.

Bambi, go to a tool rental place and buy one of those big white scrubbing pads for floor buffers, cut it into smaller pieces and use them to scrub the tile. It's much cheaper than buying white scrubbies at a grocery store. Keep a towel on the floor with you, when you finish cleaning a tile, run the towel over it to dry off the tile, getting the dirty water off the tile instead of having it dry on there again or settling onto your grout lines. Try to avoid the grout lines as much as possible. The designer grouts like to stay dry for an extended period during the initial curing time. Try just water, then if that does not work, go to white vinegar and water, then if that does not work, you can move up to grout haze removers or sulfamic acid cleaners. Contact Custom on how long to wait before using the phosphoric or sulfamic acids on the prism grout first.

Josh, prism grout is one of the new designer grouts that offers better color consistancy/accuracy and better stain resistance and it does not come in a sanded/unsanded variety. One grout goes from 1/16" to 1/2" joints. It's not cheap stuff. Personally, I've used Prism, Tec's accucolor XT, and Laticrete's Permacolor grout. Ranking wise, I go permacolor first, then xt, then prism.

Good info to know. I had never heard of it, used to the good old fashioned kind. I'll have to check it out. Thanks

Bljack, Jen and Josh. Thank you so much for the suggestions and information. I will try these out and let you know the outcome. I have laid tile and grouted many, many times and have never run across anything this tough before. Usually two or three washings at the most and the tile is clean and shinning. But not this time, so I felt sure it was the grout because I had also used this exact tile several times before with no problems.