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Re:Masks4All: Wear a mask to stop the spread of Coronavirus ... by bmn__ on Tuesday March 31, 2020 @10:24AM (#22737782)
Do not boil or steam respirator masks. It destroys the material and renders it less effective, sometimes drastically so.

Instead disinfect them with dry heat in an oven or rice cooker. https://news.ycombinator.com/item?id=22680799

Re:Masks4All: Wear a mask to stop the spread of Coronavirus ... by dragontamer on Tuesday March 31, 2020 @10:26AM (#22737807)
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3373043/

Perhaps my advice is specific to repurposed T-shirt masks then. But this study boiled the masks before testing and use.

The study was designed for poorer countries without as much infrastructure. Which is why the materials are so simple and the methods crude. But those attributes are very useful for the DIY community.

Re:Masks4All: Wear a mask to stop the spread of Coronavirus ... by gjlawran on Tuesday March 31, 2020 @03:12PM (#22741282)
Here is an awesome technical video on using different methods to clean and reuse masks. Deals with Ozone, Alcohol, UV other disinfectants https://www.youtube.com/watch?v=2UdtKssU7po