hi, we just install the kitchen porcelain tiles and we picked the sand color grout to match the beige color tiles. What a mistake!!!!!!!! we should piked the darkest color grout and we should never cared if it matched or not. I can't believe how the color changes when I mop no mater if i clean it or not. WE sealed it for 15 years but it still gets dark with dirt especially it is a kitchen floor. I went to the TILE SHOP and they told me to use grout recolorent. I need some feedback from you if you ever had a similar problem with your grout. Thanks

yes, it is a good idea to get dark colored grout, we did dark brown in both new baths. I beleive the magic eraser, bleach pen might work. maybe watered down bleach and toothbrush might work too.

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We buy things we dont need,
with money we dont have,
in order to impress people
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Believe it or not hydrogen peroxide cleans grout wonderfully. I have light biege grout on my kitchen counters. Just pour the peroxide on it and let it sit 10-15 mins. Then I go over quickly with an old toothbrush and wipe clean.