michelle wrote:

I installed ceramic tile on my basement floor. I installed a light
colored textured tile and a light colored sanded grout. I thought all
the grout was cleaned from the tile so I sealed it. After the sealant
dried there were patches all over the tile of dried grout. It was a
mess! I searched on the internet for a way to remove the grout and the
sealant. All I kept seeing was to use muratic acid. Then I saw a post
from someone saying to use a cup of sugar dissolved in a gallon of warm
water. As weird as it sounded, I tried it. Everything came off the
tile and my floor looks like it was just installed when actually the
floor stayed looking terrible for over a year until I used the sugar
and the water. I poured the solution on the floor and let it sit for
about an hour then, using a nylon scrub pad, I scrubbed the floor. I
just want to say Thank You! to whoever posted this alternative to the
acid.

When hubby and I were shopping for tile, we overheard a woman asking
about how to repair three rooms of newly installed tile she and her
husband had just ruined with muriatic acid. Muriatic eats concrete and
metal; it is not a "cleaner".