Yes, if you don't have a double boiler, you can also melt the chocolate in the microwave. Melt for 15 seconds at a time and then stir, until the chocolate is completely melted. Just be sure to use a microwave-safe bowl. You can also use your crock pot and add small jars filled with chocolate pieces to the bowl of a crock pot. Fill with water about halfway up the jars and set it to high heat. In about 30 minutes you will have perfectly melted chocolate. Turn to low and keep the chocolate from hardening while you coat the pretzel rods.