Apply the cleaner directly to the grout, let it sit for 5–10 minutes, give it a scrub, and then rinse with warm water. Promising review: "I never leave reviews on Amazon but this grout cleaner definitely deserved a review. I tried three other cleaners before buying Grout-eez and they did nothing but waste my time and money. Grout-eez got my grout perfectly clean in no time, plus it was easy to use and no oder. I'll never use another grout cleaner." —TylerGet it from Amazon for $19.95.