How to make neat silicon caulk joints
Bill Tindall, E.Tn.
Apply caulk to the joint to fill it. Spray caulk and surrounding area with Windex. Wipe up with paper towel while making a nice cove with finger.
For some reason the Windex keeps the caulk from sticking to surrounding area as it is made into a cove and the excess removed.
I saw this trick while watching a Corian installation. I forgot the details but son-in-law rediscovered them and I am reporting his success at caulking a recent project.