Things to do with leftover sweetened condensed milk (if you don't eat it straight first)

Sweetened condensed milk morphed into Caramel Sauce via the microwave:  Pour sweetened condensed milk into 2-quart glass measuring cup. Cook on 50% power (medium) 4 minutes, stirring briskly every 2 minutes until smooth. Cook on 30% power (medium-low) 20 to 25 minutes or until very thick and caramel-colored, stirring briskly every 4 minutes during the first 16 minutes and every 2 minutes during the last 4 to 10 minutes.  If you use less than one full can, the cooking time will decrease so watch for burning