OK, I would like to know a similar answer. I have ceramic tiles very small ones that were laid by sheets onto my counter top in place of another type of counter top.We grouted it with a premixed stain resistant grout. Bad idea I think now. It does resisit stains but it also still gets dirty.I have placed a marble piece there to use for mixing cool ade and chopping and all around dirty jobs to save my grout.I still end up having to spray a bleach type cleaner on the counter and using a scrubber to clean the grout as it ends up looking dirty from use Is there a better way od keeping grout clean?Should I use a sealer on it? Would that help?Anyone know the answer to this?