Regrouting

I have a tile counter top that looks average. Someone who lived in the
> house before me used caulking to fix an area of broken or chipped
> grout. It looks terrible. I need some advise on how to fix it. I have
> two possible solutions. Please tell me what you think. Keep in mind
> that the existing grout is a dull, off-white color.
>
> 1.) Remove all the grout completely and regrout.
>
> 2.) Remove only the caulking, replace it with a grout that closely
> matches the existing grout, and then stain all the grout in order to
> make it match.
>
> What tools do you suggest for removing grout which is inlayed in a very
> thin grout line?
>
> Thank You

Phill:

The best tool I know of for removing grout consists of a vaccuum cleaner and a Dremel MotoTool with the Flexshaft attachement turning a Dremel #426 Fiberglass reinforced cut-off wheel. Someone holds the nozzle of the vaccuum cleaner near where you're working while you use the spinning cut off wheel to grind out the grout. The wheel is 1 1/4 inches in diameter, and the handle of the Flexshaft is 1/2 inch in diameter, meaning you should be able to grind out the grout to a depth of 3/8 inches. The wheels are 1/16 of an inch thick or so.