Mark Donovan, of HomeAdditionPlus.com removes old caulk and installs new
caulk around a bathtub in this video. He steps you through the process of how to
carefully remove the old caulk and how to apply the new caulk to the
bathtub/floor seam.
Caulking around a tub is critical to prevent water damage to the bathroom's
subfloor. It is important that old caulk is removed first, before applying
new caulk to the bathtub/floor joint.