a security dude grabbed my laptop and said he wanted to 'analyze' it. Yeah sure whatever, I decided not to protest I was late for my flight. This analysis, it turned out, was wiping a coffee filter over the strap of its bag, and sticking the coffee filter into a slot on a machine. No solvent even. The machine had columns labelled TNT RDX NITRO PETN HMX. ..... The machine name was ION-something; I wonder whether it sucked vapors from the fiber disk or whether it was a neutron-spectrometer (?) device.

Try asking them where they've posted the California Prop 65 warning indicating which toxic chemicals are used in the system :-)