I just laid dark brown ceramic tile in my kitchen. After grouting and cleaning I still have spots and round circles (from the cleaning bucket's bottom) on the floor. I have tried soap and water and scrubbing each tile with a soft scouring sponge, but the spots and circles are still there.
How do I remove these marks?
It is likely grout haze. Wait a week, daily damp mop the grout lines. Then carefully use a haze remover sparingly (it is an acidic product) The marks will come right up. Well rinse all areas of any solution, especially any that gets on the grout.
I made the mistake of not sealing a matte bisque mosaic hex floor tile before grouting early in my tile career. I then used the haze cleaner too early. It cleaned the haze alright. It also removed some color from the grout. I had to go back and hand stain the grout lines individually. That's why I'm suggesting a week of curing for your grout.
I had glazed porcelain tiles put in "cheaply"and there were a couple bucket marks left that drove me crazy. I had no idea what they were from and didn't trust that the tile layer hadn't ruined them. I tried DUPONT haze remover, CRUD CUTTER, vinegar and baking soda (which worked partly), but then while cleaning something else with a Magic Eraser I tried it on the circles and finally they came off!!
