If you want pictures, go to the original "Cracks and Crevices" post. Thanks to your wonderful advice, now the kitchen sink has been re-caulked and looks pretty again. I also remembered to caulk around the shower faucet, which we had to remove earlier this month in order to repair the leak. I'm so proud of my brilliant husband!
And if you ever have to do that un-fun chore (which I hope you don't!), here's a video that was very helpful - Ramona's Plumber. The advice to have the new cartridge and cartridge puller handy before you turn off the water was brilliant.