Like Trefor, I have not experienced these machines, nor even heard of them before! They certainly did not have them at Los Angeles (LAX) airport when I flew into, and two weeks later out of, it last October.

And ....... it will take more than a puffer machine for me to stop going regimental. If that machine causes exposure (indecent or otherwise), then the responsibility lies with that machine, or its operator, not with me!