Sweep floor tiles and dust wall tiles in dry areas frequently to remove loose debris. Avoid using vacuum cleaners that use beater bars, which could scratch the tiles.
Damp mop the tiles with clear water, or rinse wall tiles with clear water and a sponge on a semi-regular basis to free the tiles of surface dirt and debris.
Wash the tiles as needed with a neutral pH cleanser or a cleanser specifically made for ceramic tiles. Use a soft mop or sponge with a soft-bristled brush as needed to remove ground-in dirt.
Rinse the ceramic tiles with clear water and dry them with a soft cloth to bring out their luster.
Seal crackled or crazed ceramic tiles in wet areas with a clear, impregnating sealer. Paint the sealer on twice a year with a paintbrush and buff it off with a soft cloth after 10 minutes. This will keep stains from penetrating the cracks in the glaze.