I lived in an old apartment in NY that had an old, 3/4 size refrigerator/freezer. The freezer did not have any way to defrost, so my freezer would get smaller and smaller as the frost built up. Eventually every month or so, I'd have to defrost the freezer because there was no room. But I didn't want to wait hours, unplug the freezer and refrigerator, etc. So first I tried a hair dryer to defrost the freezer. That worked ok but it took forever. I finally decided on ironing the frost out of the freezer. It worked really well.