Defrosting your refrigerator regularly can help it run efficiently and prevent frost build-up. To defrost your refrigerator, first, unplug it and remove all the food items. Then, leave the doors open for a few hours until the frost melts. You can also speed up the process by placing bowls of hot water in the freezer compartment. Once the frost has melted, wipe the inside of the refrigerator with a clean, dry cloth and plug it back in.