Do your collar points look like basset hound ears, or maybe rounded, thick, blobs of fabric? I have tried poking collar tips with a point presser, pulling with hemostats, and plenty of other methods. They all have their place, but my favorite trick that works especially well on cotton shirt collars is a simple needle and thread.
1. Thread a needle with about 12-18 inches of thread, and “double” the thread but do not tie a knot in the end.
2. Next push the needle into the seam very close to the collar tip, coming out through the seam on the opposite side of the collar.
3. Grab all 4 pieces of thread and pull gently to work the collar point out.
4. Repeat if necessary, moving closer to the collar point each time.
Try it! And let me know if you like this technique, too. Or maybe you have one you like even better—please share!