Under controlled conditions, Flinders University researchers are investigating third-hand contamination risk from methamphetamine use. Credit: Flinders University Under controlled conditions, Flinders University researchers are investigating third-hand contamination risk from methamphetamine use. Environmental health experts have found open windows and ventilation can reduce but not completely remove methamphetamine contamination on most hard surfaces of a car after an extended period. In their new study, researchers tested various parts of a car's interior to show concentrations in the air and surfaces exposed to controlled release of methamphetamine smoke. While levels generally dropped over time, the experts warn indirect exposure could still occur, in particular on textiles or soft surfaces.…