The charcoals used to burn resins get very hot. Use a burner made for resin incense, with a metal screen or with sand or rocks to insulate from the heat.The charcoals may be broken in half because they burn for nearly an hour. Light the charcoal with a lighter or match, and when it starts to spark, put it in the burner. lt is best to let the whole charcoal begin to glow before adding any resin. Then sprinkle on the resin as desired, a little bit at a time.
Keep away from kids and pets. Let the charcoal burn down completely.
Store unused charcoal in a zip-lock bag or in a jar, because they won't burn well if they collect humidity from the air.