The best and easiest
way to clean a ceramic tile floor is to scrub it with an electric floor
washer or polisher-scrubber. The thorough cleaning action should brighten
the tile and joints. Use a solution of 1/4 cup low-sudsing detergent, or
1-2 tablespoons of either washing soda or tri-sodium phosphate or
commercial floor cleaning powder in 1 gallon water. Rinse well.
When further
treatment is needed, particularly for the grout, apply a solution of water
and chlorine bleach (liquid or powdered). Let it stand for 20 minutes or
so, then mop the floor, rinse thoroughly and wipe dry. Then wax the floor
for protection and easier care.