Apparently a study was done on sterilizing N95 masks.
Quote
Stanford researchers confirm N95 masks can be sterilized and reused with virtually no loss of filtration efficiency by leaving in oven for 30 mins at 70C / 158F

Study link

It also says to not soak it in any alcohol or chlorine based liquids, since it removes the static charge in the microfibers.

Found from https://www.reddit.com/r/COVID19/

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