L.W.
Nancy
After reading the responses you received so far, my only advice is to check the sealer you used. when I sealed my grout, I used a product my cousin (who worked at Virginia Tile) recommended. He said it was really good because it "impregnates" the grout. So if you have a sealer that does the same thing (as opposed to just sitting on top of the grout), you may be better off regrouting. Trying to remove sealer that now lives 'within' the grout may be a lot of work. Just my two cents...