1. Remove the top of the bottle warmer.
  2. Pour a pot of boiling water onto the bottom of the bottle warmer.
  3. Place the bottle warmer on top of the pot of boiling water.
  4. Put a cloth over the top of the bottle warmer and let it sit for about 5 minutes or until it has cooled down.
  5. Remove the cloth and let the bottle warmer cool down completely before using it again