A simple cork in your dishwasher can fix three issues – and it’s not just about the smell

What’s so special about a wine cork

We all know a cork seals a bottle, but few realise it can address three everyday dishwasher problems because of its porous structure. Often tucked away in a drawer, a natural cork can act as both a physical and a mild chemical aid, without the harshness of aggressive detergents.

Anna Schmidt, a 42-year-old graphic designer from Hamburg, describes her experience: “I was so frustrated by the constant water spots on my glasses. A friend recommended the cork trick. I was sceptical, but the result was incredible: crystal-clear dishes, as if new!” Her testimony shows how effective a cork can be at dealing with routine washing issues.

One cork, three common dishwasher headaches

The wine cork helps with three specific dishwasher problems. First, it reduces unpleasant, musty smells that come from food residue, dampness and bacteria hiding in nooks and crannies. Acting as a natural odour neutraliser, the cork binds and traps odour molecules, leaving the machine smelling fresher.

Second, it helps cut down on water spots and the tricky “flying rust” that can appear on cutlery and glassware. Flying rust refers to tiny brown particles that do not come from stainless cutlery but from non-stainless parts like pot screws or old baking trays. A cork’s rough surface attracts and holds these particles, stopping them from marking your items.

Third, the cork helps keep cutlery shiny by catching microscopic deposits, including rust and limescale, during the wash. That prevents the dull, matte look that often requires extra polishing by hand, saving you time and effort.

How the cork actually works

The reason cork is effective is its structure. Cork is a natural material composed of millions of tiny, air-filled cells made mostly of suberin (a waxy substance found in cork). Suberin is hydrophobic; it repels water, and it can bind oils, fats and fine particles. During a dishwasher cycle, the hot water and steam boost the cork’s ability to absorb volatile odour molecules and tiny particles, so it acts like a passive but useful filter.

Putting a wine cork in the cutlery basket or drawer helps trap smell molecules and rust particles before they settle on dishes and cutlery. With millions of attachment points in its structure, the cork offers a large area for unwanted elements to cling to, so your crockery and cutlery can come out cleaner and brighter.

How to use a cork and why it’s better for the planet

It’s simple to use. Pop a genuine natural wine cork loosely among your forks and knives in the dishwasher. Avoid plastic or pressed corks (pressed corks are made from ground cork stuck back together), as they don’t have the right porous structure. After roughly 20 to 30 wash cycles, the cork will darken and look saturated; that’s a sign it has absorbed as much as it can and should be replaced.

Using a cork instead of some chemical cleaners reduces waste and cuts costs, offering a more sustainable approach to everyday cleaning tasks.

The simplicity and effectiveness of this small measure can prompt people to look for similar solutions already sitting around their homes.