Commenting on the fact that a knife, even a semi blunt one, will perforate the freezer, I have decided to do some research on the best methods to defrost a freezer and even how to prevent it frosting up in the future.
In researching the said ‘clogged freezer’ problem I found there are not many ways to sort (not sure my Dad would approve of the blow dryer coz of electricity and water so close to together)
Hot Water Method
Take a pan and fill it with water, get it nice and hot on the stove or use a bowl in the microwave. Place the hot water inside the freezer and close the door. After about 5 minutes remove the pan or bowl and reheat then put it back in the freezer. Continue until ice is melted.
I personally hate the hot water method of defrosting the freezer. I find that the ice under the hot water melts first and the pan or bowl sticks to the ice as it cools off. It’s annoying to come back every 5 minutes and it doesn’t seem to help the ice melt that much faster.
Fan MethodSet up a fan outside the freezer with the freezer door propped open so that air circulates faster. More air flow will help the ice to melt faster.
However, you might not have a fan that you can angle properly and if your thawing a unit above a refrigerator it might not be worth the effort.
Blow Drier Defrosting MethodLets think about this for a second. The goal is to turn ice into water. Blow driers and water are not a good combo. This is not the safest method. It is not recommended for safety reasons.
That said I’ll admit I’ve tried it. At first glance it doesn’t seem to do much. But what happens is the heat goes to the back and then up.
So after awhile the ice on the top will defrost away from the freezer, however with thick ice you most likely won’t see this. Instead large pieces of ice just start to break off the top.
In my experience this method along with the scrapper method and lots of towels is the fastest way to defrost the freezer.
Scrapper MethodScraping the ice is probably the most common way of speeding up the process of defrosting the freezer. But we have to make sure to do it safely. And that, my friend, means no sharp objects.
There are two reasons for this. First you could hurt yourself. Second you can scrape or puncture the cabinet of your freezer. Well, it doesn’t sound like a big deal, puncturing the stuff behind the freezer cabinet could cause a leak and make your whole freezer useless. It’s not worth the risk.
A dull object, like a plastic spatula or spoon, works better. Think of it less as ‘scrapping’ and more as ‘assisting’ large chucks of ice to come out before they melt.
This method works well with the blow drier because as the ice starts to defrost off the wall or ceiling you can get the spatula under that and take out larger chunks.
Wooden Spatula Method (did sound the same as the scrapper method)
Whilst the freezer is completely empty, use the wooden spatula to gently scrape the sides, top and bottom of the freezer, but don't force anything that won't come away, and do not use anything metal for this job, and particularly nothing sharp like a knife, as you might pierce the delicate plastic walls (regrettably I speak from experience , which is why I had to buy a new fridge).
Preventing Frost in the Future
Once your freezer is completely defrosted, there are a few actions you can take to prevent this problem from developing as quickly again in the future. First, wash all the walls and shelving in a mix of water and baking soda. This will not only clean up the last of the ice, but also leave your freezer smelling fresh. Then, dip a cloth in a small amount of vegetable oil and brush it along all the surfaces of the freezer. This will prevent ice from reforming for much longer.