cloudiness clearly left from not cleaning thegrout

cloudiness clearly left from not cleaning thegrout Images

cloudiness clearly left from not cleaning thegrout

cloudiness clearly left from not cleaning thegrout Description

I recently installed Brazillian slate tile in my entry way and (http://maplered.com) bathrooms.  There is a cloudiness clearly left from not cleaning the grout off completely.  Is there any way to remove the excess grout from the slate Tiles (http://www.g682.net) ?  I fear that I have ruined the Tiles (http://www.g682.net) !