there's a great alternative that will help you achieve crispy-clean caulk lines. Painter's tape! This method involves applying painter's tape along both sides of the area you plan to caulk ...

Step 2: Prep the baseboards with painter’s tape. If there’s any existing caulk, remove as much of it as possible; a putty knife, 5-in-1 tool, or wire brush can help dislodge the old stuff.