Dish Soap Cut Bacteria On Used Medical Gear As Well As Hospital-Grade Disinfectant

When a hospital runs out of supplies in a war or disaster, the fix might already be under the sink. A new Swedish study found that plain dish soap cut bacteria on used breathing tubes, IV lines, and catheters just as well as 70% alcohol and a strong hospital disinfectant called peracetic acid, with no clear winner among the three.

Researchers were trying to solve for a grim scenario: a hospital during a war or major disaster, its shelves of single-use medical supplies empty. Breathing tubes, IV lines, and urinary catheters that are normally used once and thrown away suddenly become precious, and what happens next could mean the difference between treating patients safely and running out of options entirely.

To test that scenario, researchers collected 90 pieces of medical equipment already used on real surgery patients, then cleaned each one using the three methods. Writing in the journal Prehospital and Disaster Medicine, the team reported that all three did the job, sharply cutting the live bacteria on the equipment. On the breathing devices, respiratory germs that showed up before cleaning came back negative afterward.

This is not an endorsement of tossing used medical gear in a home sink. Study authors frame reuse as a last-resort emergency measure, not a replacement for proper sterilization. But when those shortages turn real, the findings offer a rough, science-backed playbook for stretching what little equipment remains.

Testing Dish Soap Against Hospital-Grade Disinfectant

Scientists at a regional hospital in Sweden gathered used equipment right after surgeries, including breathing tubes, laryngeal masks (a type of airway device), IV tubing, syringes, urinary catheters, and feeding tubes. Rather than testing in a pristine lab, they set up in a soiled utility room next to the operating area, the kind of grimy, low-resource space that mimics what a hospital in crisis might actually look like. Three team members with no special training did the cleaning, again to simulate what a real emergency might demand of overwhelmed staff.

Researchers randomly assigned each item to one of three groups: peracetic acid, 70% alcohol, or a common brand of dish soap. Every device got the same treatment: a 30-second scrub with a brush, ten minutes of soaking in the cleaning solution, and ten minutes of air drying. Researchers swabbed each device for bacteria before and after cleaning, and the airway devices got an extra round of genetic testing that screened for 28 known respiratory germs.

All three cleaning methods produced a real, measurable drop in bacteria, and when researchers compared the methods, none stood out as clearly better. In plain terms, cheap dish soap held its own against a professional-grade disinfectant.

Genetic testing on the airway devices produced the clearest before-and-after picture. Before cleaning, roughly half of those devices (14 out of 30) tested positive for respiratory germs. Among those airway devices, the most common culprits were a bacterium called H. influenzae (found on 30%) and Staph (found on 23%), and some samples carried more than one type of germ. After cleaning, every test came back negative, no matter which of the three methods was used.

Just as important for anyone worried about wear and tear: none of the 90 devices showed any damage or loss of function after cleaning. Tubes still worked. Syringes still worked. Nothing cracked, leaked, or fell apart from the scrubbing and soaking.

Researchers did notice one hiccup. When IV lines and syringes were cleaned in the same wash bucket as airway devices, there were early signs of possible cross-contamination between items. When the team reran that part of the experiment and cleaned IV equipment separately from airway gear, they did not see the same signs of cross-contamination. Because IV lines and syringes feed directly into the bloodstream, the researchers still recommend keeping these high-risk devices separated from other equipment during any cleaning process.

Why Hospitals Are Considering Dish Soap in a Crisis

Hospitals in wealthy countries, including Sweden, have leaned on single-use equipment for years because it is easy and reduces infection risk. That convenience comes with a catch: when supply chains break down, whether from a pandemic, a natural disaster, or an armed conflict, there is often no backup plan for what to do once the disposable stuff runs out.

That problem wasn’t theoretical during COVID-19, when hospitals worldwide scrambled to find ways to clean and reuse supplies they normally would have thrown away. Wartime conditions raise the stakes even further. Health systems responding to armed conflict have reported severe shortages of basic medical equipment, forcing rationing, improvisation, and on-the-fly rule changes.

Reusing single-use devices isn’t a new idea on paper. In the United States, the Food and Drug Administration allows certain companies to reprocess used medical devices under strict rules, and the European Union permits it under its own regulations. What’s been missing, according to the study’s authors, is solid evidence on whether basic, low-tech cleaning methods, the kind available to a hospital cut off from its normal supply chain, actually work well enough to matter.

Dish Soap Is a Last Resort, Not a New Standard

Nothing about this research suggests hospitals should start washing and reusing breathing tubes as routine practice. The study authors are blunt about that point, calling reuse a strategy to consider only after other options, like rationing supplies, switching to reusable alternatives, or adjusting treatment plans, have already been tried. Simple cleaning cannot match validated sterilization, and the study tested devices through a single use-and-clean cycle, so nobody yet knows what happens after repeated reuse over a long crisis.

Still, the main point stands. In a genuine emergency, when the alternative is treating patients with no equipment at all, dish soap and a ten-minute soak may sharply cut the germs on tubes and catheters that would otherwise be thrown away. That’s not a comforting thought under normal circumstances, but for hospitals bracing for war or disaster, it’s a small, practical piece of good news.

Disclaimer: This study measured how much bacteria three cleaning methods removed from used medical devices, not whether those devices can be safely reused in patients. The researchers did not study patient outcomes, and they say the results cannot establish clinical safety or effectiveness. The authors describe cleaning and reusing single-use medical equipment as a last-resort measure for crises, disasters, or war, to be considered only after other options are exhausted, and emphasize that it cannot replace validated sterilization. This article is for general information and is not medical guidance.