Originally Posted by Boggie Dog

I can't interpret but from my observation of TSA ETD practices at DFW yesterday I would suspect the validity of these tests. My bag was pulled for extra screening, the culprit was a ziplock with some candy and cheese crackers. The screener took a used ETD swab and sampled the ziplock bag all while wearing gloves that were potentially already contaminated. I observed the exact same process by a different screener checking a ladies toaster snacks except he tested each wrapped package.

I would at a minimum require the screener to test their gloves for contamination before testing a travelers property and I question reusing test swabs at all.