Stanford has done a study-released yesterday, about sterilizing masks.

[58Sunliner]

https://stanfordmedicine.app.box.com/v/covid19-PPE-1-2

"In this materials science study of N95 face masks, two disinfection methods which do not reduce the filtration efficiency of the meltblown layer after an appreciable number of treatment cycles were found:
•Method 1: 75°C (158 degrees F) Hot Air (30 mins) for 20 cycles
•Method 2: UV (254 nm, 8W, 30 min) for 10 cycles. Steam treatment causes filtration efficiency to drop to ~85% after 5 cycles, and ~80% after 10 cycles."

I use my dryer shelf insert and use an infrared temp sensor. My dryer is an older Duet and I reach temps of 176 degree F in about 8 mins on the medium setting, which is supposedly a 32 minute cycle. Mine tends to shut off early so I go for 2 cycles.
Watch out for the metal nose bridge coming off. I re-glued one.