For routine cleaning of the ceramic tiles, dampen a mop with clean water and mop over the tile floor. You also can put 2 gallons of clean water in a bucket, and add 1 cup of rubbing alcohol to it. Mop the floor with this mixture. You also can mop the floor with a household cleaner such as Lysol diluted in water. Avoid using cleaners that contain bleach, as it may discolor the grout.