https://techcrunch.com/2020/03/27/duke-university-uses-vaporized-hydrogen-peroxide-to-clean-n95-face-masks-for-reuse/

With shortages of N95 face masks persisting nationwide, healthcare facilities are scrambling to find ways to clean and treat the masks for reuse to protect doctors and nurses most at risk of exposure to COVID-19.

Duke University thinks it has found a solution using vaporized hydrogen peroxide to decontaminate the masks.