UK - is in that a tool that make it comfortable to remove ancient grout? in my shower cubicle. I have a soak and think it is...

in my shower cubicle. I have a soak and think it is the silicone, but might as well brighten the undamaged place up. Is there a tool on the market that make this easy? Then I will replace the silicone seal. Anyone have any real good results?
I can't be more precise as I don't know the names but in short yes, within are tools to help you remove silicone sealants and grout, I got both from B&Q. http://www.askthebuilder.com/B150_Tile_G...
I read all the answers to the question.

A couple of general public got it right on the nose. I like the dremmel. The only thing nearly the dremmel is that it runs wild. I think beforehand I would do a grout removal and replacement, I would remove the tile and start over. You're going to make mistakes with the grout and you'll be overwhelmed. Think going on for all the work you'll do, and what was the purpose of the drill, to find a outflow.
Answers:    if you get a steady hand you can't beat a dremel to remove out-of-date grout.
http://www.dremel.com/Pages/default.aspx
Grout removal tool - Focus DIY stores - lb2.99 B & Q put on the market them its a yellow triangular shaped tool with teeth