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.