Now that folks are finally realizing that any mask shy of a KN95 or N95 is less than optimal for protecting from Covid, there's been a bit of study on re-using them, and laundering them. Been doing both with mine for a while. You can get a good 25 uses out of one, if you're careful.
From the article: "N95 respirators were decontaminated with vaporous hydrogen peroxide 25 times. No alterations to respiratory integrity or filtration efficiency seen by 25 cycles. Vaporous hydrogen peroxide does not appear to impact fit or filtration efficiency using this defined process."
And another take - Rotate them - set the mask aside for a day or two, in a cool, dry place - perhaps a paper bag. Any viruses will expire. Check for fit, fraying, and the elastic bands holding up.
As they say, Who was that masked man?
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