Every freezer ends up with it sooner or later: a crust of frost on the walls, ice welded around the trays, drawers that no longer close. Before reaching for a knife, some people now try something unexpected: a few balls of aluminum foil tucked inside. Here’s what the trick is meant to do, and what really keeps the ice away.
In short
- Small foil balls go in the corners, and sheets of foil can line the floor or walls of a clean freezer.
- The idea: frost forms on the foil, which you lift out instead of scraping the appliance.
- Frost comes from warm, humid air: door openings, a worn seal, warm or unsealed food.
- Never chip ice with a knife, and defrost once frost reaches about 1/4 inch.
What it’s for
The tip, described by the German news site Ludwigshafen24, has also been widely shared by Spanish and Hungarian media. The method has two parts:
- Form several small balls of aluminum foil and place them in the corners of the freezer or near the back wall.
- After cleaning, line the floor or the walls of a compartment with a sheet of foil.
When ice builds up, the article explains, you remove the foil along with the ice instead of scraping the inside of the appliance. Smooth aluminum is said to let ice “adhere less well,” so it comes away more easily.
Where the ice really comes from
Foil doesn’t stop frost from forming. To understand why ice keeps coming back, you have to look at the moisture. Whirlpool lists the three usual causes: opening the door or lid often, which lets warm air in; a seal that no longer closes tightly, which causes condensation; and food stored while still warm or poorly wrapped. Every time humid air touches the cold walls, a thin layer of frost forms, and the layers add up.
How to use it, and what to do first
- Start with a clean freezer. Whirlpool recommends defrosting when frost reaches about 1/4 inch, and at least once a year.
- Line, don’t cover. A sheet on the floor or a shelf is enough. Leave vents, the drain and the door seal completely free.
- Keep the balls small and out of the way of fans and drawers.
- Fix the cause: check the seal, let leftovers cool before freezing them, and wrap food well.
The limit
Don’t expect miracles from the balls themselves. Ludwigshafen24 cites no test, and its explanation that foil “insulates” doesn’t hold up: aluminum conducts cold very well. The real benefit is mechanical, ice that peels off with the sheet. The trick mainly concerns manual-defrost models and chest freezers, since frost-free freezers clear their own frost. And whatever happens, Whirlpool is clear: never use “an ice pick, knife, or other sharp-pointed tool,” and never a hair dryer or heater to speed things up. Use a plastic or wooden spatula.
Foil has other clever uses at home, starting with lining kitchen drawers. And while you’re rethinking your kitchen, see the appliance more and more kitchens are using instead of the microwave, or the two glasses of water that steam an oven clean.
A clean freezer, a sheet of foil, a door that seals. That’s the trick.
