Defrosting a freezer isn’t exactly the most glamorous task, but it's one that must be done from time to time. You’re probably wondering what the point of defrosting your freezer is. It’s actually an important kitchen task that helps increase the life and performance of your refrigerator. The point of manually defrosting a freezer is to help it maintain efficiency. It should be done every time a quarter-inch of ice builds up inside your freezer’s interior walls. While it may be tempting to do this as infrequently as possible, it’s a process that shouldn’t be skipped if you want your freezer to run as efficiently as possible.