The tiler did not clean the tiles properly after grouting. He then sealed it, leaving the beautiful tiles covered with hazy streaks that will not wash off.
How to remove tile & grout sealer off ceramic or porcelain tiles?
July 5th, 2010 
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Grout Tile Cleaner
Everything about grout tile cleaner
July 5th, 2010 support 
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Like Peter I d go w/ a grout remover 1st .Acids can take the glaze right off the tile.. First call the tile person back..Ttile should be free of any grout haze before sealing..If you can t get them back try it yourself.. Hydroment makes a product called Remove.. I ve used it along w/ a white nylon "scratch pad" or doodle bug it s called..get these at you regular mom and pop tile shop..They may use a differant type product just talk w/ them, it s better than some big box stores GL
I would make them come back and correct the installation. If that isn’t an option you could try using a mild abrasive like Soft Scrub on a few inconspicuous tiles. That may be enough to get through the sealer. Then with a clean sponge and clear water wipe the tile down well. The sealer doesn’t belong on the tile any way, just the grout.
Good Luck!
Scrub with some vinegar and water. I use a microfiber washcloth.
try vinegar and water about 50/50 it works for me,good luck.
I’m afraid Muriatic Acid is about your best bet, but this stuff can be tricky to use and potently dangerous. Make sure that there is plenty of ventilation in the room. Use an exhaust fan and another fan for air movement. Also wear the proper face, eye and hand protection. Follow the instructions on the label for the proper dilution. Use a stiff brush and with a circular motion scrub the floor. (As if you were applying wax on your car) rinse with clear water and reseal.
Check out this web site: http://www.naturalhandyman.com/iip/infxtra/infmur.html
Its been a while but I think there is a specific Haze cleaner solution & then you could re-apply the sealer again just make sure you give the grout a good scrub before applying the new sealer.Try going to your local specific tile shop they should be up to date with the latest products & ask for a Haze remover or cleaner & he should be able to advise you further.Good luck with it all.
Mary…
buy Singulair…