DIY Rice Heating Pad to Soften and Remove Doll Heads or Reroot

This is a great way to have a heating pad that actually works for your dolls! And you too!
This was on my Patreon. I am making it available now for everyone.
Supplies
Cotton fabric or a natural fabric that is microwave safe.
Any rice or cherry pits. Rice might work better because it is small.
A funnel.
Sewing machine or needle and thread.