I would very much like to tell you all that I am surprised to learn that people have been accidentally setting fires by putting their masks in the microwave to sterilize them, but that would be a lie. What does surprise me, however, is that the sort of person who would do a thing like that is somehow smart enough not to be part of the anti-mask crowd.
The fire marshal is also warning people not to use a microwave to sterilize face masks or other personal protective equipment. Pegg says microwave ovens are not designed to heat cloth materials, so there is a risk of the mask overheating and catching fire.
Betts says he is not aware of any fires caused by microwaves and masks in Ontario, but says it has been an issue in the United States and United Kingdom.