[Zhang Fei]

[I wonder how long the virus persists on a mask. If they could be left unused for a period of time then reused, that could help, especially for the layman.]

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People have oven thermometers and toaster ovens. Crank up the oven to 165F. Verify that the temperature is 165F (and not higher, given that elastic and plastics do melt at higher temps). Stick the masks in. Set a kitchen timer for 2 minutes. (Nothing wrong with overkill). Remove the masks with kitchen tongs to avoid burns.

[FreedomForce]

I only have 3 (2 1/2 really since 1 of those is valved) N95 masks left over from years ago. Haven’t used them yet, but having so few i want to be careful not to damage them. Heating them in the oven still sounds like the way to go.