Secondhand Meth Exposure: Can You Test Positive Without Using? | DrB360 Explains When meth is smoked or cooked, it vaporizes into tiny airborne particles — and yes, you can inhale them without ever touching the drug yourself. In this video, DrB360 breaks down what really happens in a closed space with a meth user, how secondhand exposure works, and why people living in contaminated homes can test positive for meth in their hair or urine over time. If you’ve ever wondered whether secondhand meth