Can a single-use surgical mask be disinfected and reused?
With mask mandates in enclosed public spaces, many are frequently donning and doffing masks to guard against COVID-19.
If you're using disposable surgical masks, you might wonder: can you wash and reuse them?
The answer isn't always straightforward amid conflicting advice online. Here's clear, evidence-based guidance from health experts.
Disposable surgical masks are not designed to be washed, disinfected, or reused.
Once worn and removed, discard it immediately in a trash bin.
Avoid adjusting it by pulling it down under your chin or hooking it on one ear—these actions render it unusable.
Any manipulation after wearing contaminates the mask, risking self-infection or spreading the virus.
Even without removal, do not wear a disposable surgical mask for more than 4 hours continuously.
After this time, discard it and replace with a fresh one.
You may have seen suggestions to disinfect masks using ovens, microwaves, UV light, or bleach. However, health authorities do not endorse these for reuse.
None are reliable or safe for home disinfection. Always dispose of used single-use masks properly—not on the street.
Household oven: Stanford School of Medicine tested 70°C for 30 minutes, but it required specialized equipment—not your kitchen oven. Replicating this at home is ineffective and risky.
Microwave: A UFC-Que Choisir study suggested potential disinfection, but optimal timing is unknown. Plus, the metal nose strip can spark, damaging your appliance and mask.
UV light: Exposure kills viruses but degrades the mask's filtering capability, making it useless. Home UV devices are also impractical.
Alcohol or bleach: These may eliminate viruses but compromise the mask's filtration and leave toxic residues, even after rinsing.
In short, discard surgical masks or FFP3s after one use.
Fabric or cloth masks are the only type suitable for reuse.
With proper cleaning and disinfection after each use, they can be worn multiple times. Learn how here.
Need one quickly? Here's a no-sew tutorial to make your own.
Or even simpler, discover how to create a fabric mask in just 1 minute here!
