If you’re someone who likes having less things to do, automatic defrost is for you. Most refrigerators, freezers, and combo units on the market today offer automatic defrost controls (manual defrost is still around, but it’s rare). This setting functions by slightly heating the interior at intervals, which melts frost into the drain pan at the bottom of the unit. They use a bit more electricity than manual defrost refrigerators — those heating coils aren’t about to power themselves — but they don’t frost over or require unplugging, while their manual counterparts do.