SloppyShooter
Certifiable
The cop will observe his test subject for a minimum of 15 minutes prior to taking the breath sample to assure there's no interference from residual (mouth) alcohol. The beer from an hour ago will have dissipate. The beer from 5 minutes ago won't be measured in the sample.
My experience shows different. Of course, my mouth is not normal either, due to salivary depreciation. So???
But there have been cases of people blowing over, going to the police station 15 minutes later and testing legal.