The answer to 'how often to clean grout' is that grout should be cleaned at least once per year, and more frequently in high-traffic areas. Grout is a porous material that can easily trap dirt, grime, and bacteria, so regular cleaning is important to maintain the appearance and hygiene of your tile floors and walls.
The exact frequency of grout cleaning will depend on factors like the amount of foot traffic, whether you have pets, and whether you use your kitchen or bathrooms heavily. In general, high-traffic areas like kitchens and entryways may need grout cleaning every 6-12 months, while low-traffic areas like guest bathrooms may only need it annually. Pay close attention to any discoloration or buildup, as that's a sign it's time to clean the grout.