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I've tried homemade recipes with baking soda and lemon juice. I've also tried store bought cleaner/repair stuff. So far, it's still dingy.

Anyone know of a powerful (and somewhat safe) product that can get the grout back to what it use to be so I can reseal it?

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might be easier to scrape them out and just regrout. –  DA01 Jan 17 at 21:36
Thanks for the input. That's what I was afraid of. –  317MarkWalker Jan 19 at 19:50
If you haven't tried a grout saw, get one: they're only $8 at Home Depot. Then try scraping as little of the old grout out as possible. You should only have to scrape out about 1/32" to get down to clean grout. And don't try to do it all at once. Just take your time and enjoy your handiwork. –  getterdun Jan 21 at 4:32
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