You can take Lamisil with food or on an empty stomach. Even though the fungus may appear to go away sooner than 12 weeks (or 6 weeks for fingernail fungus), it is important that you take it for a full 12 weeks (6 weeks for fingernail fungus) to make sure that you kill each and every fungus cell.
Ceramic-tile floors can be cleaned easily with nothing but warm water, but be sure to sweep or vacuum first to remove any loose soil or grit. Never use a sponge mop to clean ceramic-tile floors. It will pull the dirt right into the grout tracks.
The best way to clean grout is with an alkaline cleaner, found in brands like Spic and Span and Mr. Clean or in specialty cleaners available at most tile retailers that are designed for tile and grout. You can also use the same cleaner on tile or you can simply use water as tile is usually easy to clean.