N95 Respirator Cleaning and Reuse Methods [View all]

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7161499/

N95 Masks Can be Rotated, 1 Mask Every 3–4 Days

Use 3–4 masks, numbered on the outside as 1–4, for each day. They can be used each day in numerical order. All SARS-CoV-2 viruses on the mask will be dead in 3 days (2). Masks should be kept at room temperature (21–23°C [70–73°F]) and 40% humidity. There is no change in the mask's properties.

N95 Masks Can be Heated at 70°C (158°F) for 60 Min

Masks will retain 98.5% FE after heating for 24 h, and masks may be heated multiple times without a loss of FE. Hang the mask in an oven using plastic or wooden clips. If the mask contacts or is < 6” from hot metal, there may be severe material compromise and charge loss. For damaged elastic bands, equivalent elastic may be restapled onto the mask.

More important information included in the article.