Now that the U.S. Centers for Disease Control and Prevention (CDC) has recommended wearing face masks in public to slow the spread of COVID-19, it’s important to know how to properly wash, disinfect, and handle reusable cloth masks.
Ryan Sinclair, associate professor of environmental microbiology at Loma Linda University School of Public Health, says his research supports the idea that fabric masks, when not properly disinfected, are carriers for bacteria, including E. coli, and viruses such as norovirus and coronavirus.
Sinclair says pathogens like bacteria and viruses can live on cloth fabric for longer than one may think — up to 8 to 12 hours. “Because we don’t know what germs we’ve been in contact with or how long the germs have been active on the cloth fibers, it is crucial to regularly wash, sanitize, and dry reusable face masks,” Sinclair says.
Part of wearing a mask is washing a mask. Here’s the best way.
How to Clean, Disinfect, and Dry Your Cloth Mask
Although it may be time-consuming to wash reusable masks daily, after each use, Sinclair says this healthy habit is essential to prevent germ transmission. “Have a few extra face masks on hand so they can be rotated,” Sinclair says. “That way, you will always have a fresh, clean mask ready to use.”
Masks made from a cotton material stand up best to hand or machine washing with bleach or other disinfectants. “These fabric masks are the easiest to clean and dry properly,” Sinclair says.
He says to wash your hands for at least 20 seconds with soap and warm water before and after handling soiled masks.
Launder Masks by Completing These Steps
5. Dry masks on the highest dryer setting, or use direct sunlight to dry masks. Because household dryer temperatures rarely reach the threshold temperature you need for disinfection, consider adding disinfectant dryer sheets or dryer sanitizers.
Face Mask Hygiene Etiquette
To further reduce the risk of infection, Sinclair offers these hygiene etiquette tips:
In addition, Sinclair advises washing your hands frequently, keeping surfaces at home sanitized, and avoiding any touch of high-traffic public areas like counters, handrails, and doorknobs.
“If you practice these habits, you will be less likely to contract the virus, whether it’s on your mask or another surface,” Sinclair says.