Freezer
Cold does not clean. Everything spilled in a freezer is still there, held in place, and the smell only announces itself once it thaws.
Precautions
- Disconnect from the power supply first
- Check the manufacturer's instructions
- Test on an inconspicuous area first
Start here
What this is, what tends to go wrong with it, and what to do about it.
Made from
What tends to go wrong
A living growth, not a stain. Killing it and removing the staining are two separate jobs, and neither addresses the moisture that caused it.
Why it is difficult: Porous and non-porous surfaces, Moisture control and recurrence, Cleaning, sanitising and disinfecting, Organic load, Surface roughness
A hard, chalky calcium carbonate deposit left by hard water. Dissolved by acids, essentially untouched by detergents.
Why it is difficult: Water hardness, Crystallisation, Adhesion and cohesion
- Dustvia its material
Mostly textile fibres and skin, held by static as much as by gravity — which is why a dry cloth on a plastic surface makes it worse.
Why it is difficult: Static and dust, Mechanical action and abrasion, Why different surfaces get different dirt, Surface roughness
A concentrated water-soluble dye with nothing else in it. Nothing has to be emulsified or dissolved — the only question is whether the surface has taken the colour up.
Why it is difficult: Capillary absorption, Dye migration and colour bleeding
A sticky, yellow-brown tar film deposited everywhere at once. It is the reason a room smells after everything visible has been cleaned.
Why it is difficult: Adsorption of odour molecules, Solubility and polarity
Coloured by turmeric in most prepared mustards, and curcumin is a pH indicator — which is why an alkaline cleaner turns a yellow mark red.
Why it is difficult: pH indicators in stains, Fat-soluble pigments, Photodegradation, Pigment retention
The commonest cleaning problem that is not dirt. The tackiness is the plastic's own additive arriving at the surface, which is why wiping it off works for a week.
Why it is difficult: Plasticizer migration, Damage versus soiling
The science behind this: Solvent crazing, Static and dust, Solvents and polymers, Plasticizer migration
In detail
A freezer is a preservation environment rather than a sterile one: low temperature slows microbial activity and chemical change without stopping either, so spills, packaging residues and odours accumulate and persist. The practical consequences differ from a fridge's. Defrosting is the real cleaning event, because ice build-up traps whatever spilled beneath it and because a thick ice layer also costs efficiency and space. Warm water and a mild detergent are the appropriate cleaner; the refrigerator manufacturer's guidance for the interior of a cold appliance directs a mild solution and warns against abrasive and harsh cleaners on the liner and the seals, and lists cleansers containing petroleum products among those not to use on the liners. The door seal deserves specific attention, because the refrigerator manufacturer asks for the gasket to be cleaned of crumbs and dried fully to keep a tight seal. Odour transfer is the other recurring complaint and it is a packaging problem rather than a cleaning one — cold air circulates volatile compounds between poorly wrapped items.
Related
- Freezer is made from Household plastics
- Freezer is made from Painted and coated steel
- Freezer is commonly affected by Mould
- Freezer is commonly affected by Limescale
Sources for this page
Sources
Cleaning the Interior of the Refrigerator
Whirlpool Corporation · Manufacturer documentation
Relied on for: That the interior is cleaned with a mild detergent solution and that abrasive and harsh cleaners are excluded from the liner and the seals. (states this directly)