There is something I read about the other day that I'd love to do to people in masks though.

I'd like to get a little aerosol spray bottle with strawberry or peppermint in fragrance in it.

Spray it in front of someone with the mask.

"Can you smell that?"

"Yes, it smells like peppermint."

"The aerosol droplets in this spray are larger than COVID, if that mask works how can you smell it?"