Lighten grout

[manamok]

First post.

I recently had my kitchen tiled and several weeks later the tiler had to return to reset some loose tiles. Even though he used the same grout both times the second time the grout dried several shades darker than the first. I would like to lighten the newer grout to match the original.

Can I use a diluted bleach solution or some other solution to lighten the second grout application?

Any suggestions would be appreciated.

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[Davestone]

Actually the first batch was probably done with too much water and washing it with sulfamic acid might bring out the color.In fact ging over the whole floor might bring the two colors closer together.Put a name in your sig for us for future referanc.