Just common sense germ theory.
Common sense germ theory would say ‘ditch the germy mask’ and get out, breathe the FRESH air, and don’t be fooled by the fake science.
Was out running errands, yesterday, and cannot tell you how many nasty masks we saw in parking lots. Just gross.
Was at a ballgame, the other night, and went to the ladies room. The gal next to me was waving her mask around, WHILE SHE WAS USING THE RESTROOM....then put that nasty thing back on her face, to wash her hands.
She was one of the VERY few even wearing a nasty mask.
Even if you replace your mask after EVERY store/outing....it is still full of germs.
But...best of luck to you/yours, with your mask wearing.