Wow. Talk about solving the real problems! I'm not sure if this has been an issue yet, but how do you QC masks from known good manufacturers to make sure quality doesn't slip?
if there are any engineers out there able to come up with some sort of solution to the testing problem, we'd absolutely work with them to test samples from every single production batch we get.
Colorado State University has retooled a lab to help with this problem: https://www.youtube.com/watch?v=h7Vm0ryL1jo