AJScott wrote:

(snip)
Can anyone think of similar tool that would fit into 1/32 grout line and is
strong? The commercial grout blade sold at home depot are way too thick to
even fit into the grout lines. For this reason, I also cannot use dremel
tool.

Are you sure that the HD grout saw won't work? Remove the tungsten
carbide part, reassemble, and I think you'll find that it's less than
1/32". I used about three blades (throwing away the tungsten part) on
my bathroom recently. Those, utility blade knives, and cotter pin
extractors (see your automotive supply store) are IMO the tools of
choice. Dremel tools are just too vicious.

FeelFree

To say anything you want.