I came across a tool that I think is useful for removing old caulking. I found it in a salvage store and it appears to be British. I had trouble getting on the .UK website but did find this. I gave a dollar for it so I have nothing to lose.<br/>Remove Caulk and Silicone<br/>I have made little use of it yet so don't have a lot of experience with it.<br/>Gary B<br/>