I moved into a house with nasty grout. I had tried cleaning it with a toothbrush and bleach and it didnt work out too good. I saw the sonic scrubber and decided to try it. I used soft scrub gel w bleach and the sonic scrubber and my grout is sparkling white! I couldnt believe how well the scrubber worked. I went through a pack of batteries but it was well worth not having to scrub!! If your on the fence... get a sonic scrubber!!
Port Orange, FL