When caulking around a tub, start by lining both sides of the joint with masking tape. After applying a bead of caulk, run the rounded edge of an expired plastic gift card along the joint to wipe off any excess caulking. Carefully remove the tape before the caulking hardens.
Using the tape was something I had not heard of, but using the gift card fablous. Instead of buying a tool to do the job. Thank You
A Popsicle stick works much better than a gift card.