I have done a bang up job of caulking my ceramic tile shower stall. However, my wife doesn't like the color of the caulk I used. The caulk is about 1 week old and the shower has not been used and has been completely dry for a month or two. I have now found the matching Tec caulk. Can I just caulk over the other new caulk to change the color? Will it stick? Will it curl up and not stick?