HOW OFTEN? Once a year
Want the tiled surfaces in your bathroom and kitchen to stand out? Brighten the grout with a simple homemade cleaner. Spray a 50-50 solution of chlorine bleach and water onto the grout (never use bleach on colored grout). Let sit for 20 minutes. Using a grout brush dampened in clean water, scrub to remove excess bleach and debris. Blot with a dry cloth.
EXTRA CLEANING TIP: Dilute this solution by half and use it to get white tiles sparkling clean.