I recently bought my first home, and am trying to be a good homeowner. I know that the bathtub, toilets, and sinks (anything else?) are supposed to be caulked well. I have no idea how long the current caulk has been there. Nor do I know how to tell if it's still "good" or needs to be redone.
What should I look for to determine when it is time to go through the re-caulking process?