The answer to 'when to clean grout' is that grout should be cleaned regularly, typically every 6-12 months, to maintain its appearance and prevent buildup of dirt, grime, and mildew. Regularly cleaning grout helps extend its lifespan and keep your tile floors and walls looking their best.
The frequency of grout cleaning can vary depending on factors like how much foot traffic the area receives, whether the grout is sealed, and if there are any spills or stains. High-traffic areas may need more frequent cleaning, while sealed grout can often go longer between cleanings. It's a good idea to inspect your grout every few months and clean it when you notice it starting to look discolored or dingy.