[Myth statement] ...using mouthwash before the test. [Status] Busted [Notes] 
On his initial test, Adam's blood alcohol level was indicated to be at near-lethal levels. When he tried again however, the reading came back only slightly elevated over his initial result. Even if a driver were able to use this method to generate a pair of clearly impossible results, which could throw doubt on the testing machine's accuracy, that driver would then be required to immediately submit to a blood test, which cannot be fooled in any way and would definitively prove the driver's true blood alcohol level.