I wonder what ironing the mask would do.......
I don't know how hot irons get. I would wonder about excessive heat damaging the fabric of a cloth mask.
It would melt the plastic filaments holding it together. It might damage the elastic.
Leaving it it bright sunlight will let the UV light damage the cells. But it needs to out the for a while. Again, you will wreck the elastic.
I wonder what ironing the mask would do.......
********************************************
Why isn’t laundering them enough? The detergent should break down the lipid envelope of the virus and kill it. Just like soap and water does when you wash your hands.