My last house has ceramic floors in the kitchen. I used anything I had to clean them. Pine Sol, Mop and glo, Shakley products, even Dawn dish soap. They were clean but not the grout. The grout started to look brown. So the give it a good clean and to whiten the grout I used half bucked HOT water and put in a good measure or two of Oxiclean powder. I used a deck cleaning brush on handle and scrubbed the floor. Then rinsed with clear water. The floor and grout was white and very clean again. This doesn't have to be done every time. I found I only had to do it every 3-4 months. With animals and shoes I cleaned the floor every several days. I never had any issues with the floor being slippery.