Many grocery shoppers know the routine: bring fruit and vegetables home, rinse them, dry them and hope they stay fresh long enough to be eaten. But fresh produce is delicate. Grapes shrivel, apple slices brown and berries can spoil quickly.

At the same time, many people worry about what may remain on the surface of fruit they buy, including pesticide residues.

Cleaning and freshness are usually treated as separate problems that require different treatments. Washing feels like a simple act of control. But it’s not quite that simple.

The U.S. Food and Drug Administration recommends rinsing produce under running water and says soap, detergent and commercial produce washes are not recommended. Water helps, but it does not solve every problem.

Our new study suggests those goals may be combined. We developed a dual-function biodegradable wash that is able to remove surface pesticide residues and form a thin protective layer to help fruit stay fresh for longer.

The timing matters. Around one quarter of fruits and vegetables are lost or wasted globally each year. For fresh produce, even small gains after harvest can matter because quality can change quickly during shipping, storage and daily use at home.

What’s........

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