I'm wondering maybe a EtG test caused the result? I did them concurrent with PEth's for 2 years while on the transplant list. An EtG test is a urine test (stands for ethyl glucuronide). I seem to recall the NIH states this test is subject to false positives. Anything containing alcohol - hand sanitizers, anything fermented, even some food products with vinegar may cause a positive. You don't have to drink it - topical applications count. I was kicked of the list and had to continue weekly testing, all the way raising cain with them. Every Monday, I dreaded getting the results. This is zero help but it sure resonates with me.