The breathalizer is known to make mistakes usually not in the favor of the breather either. Certain spices, medicines (inhalers espically), mouthwashes, etc can cause a higher reading, if you think you may have reason not to take it you can opt for a blood test which gives a better true reading. If you've had to much to drink & you still drive, you're no better than a gangbanger spraying a tec 9 out a car window during a drive-by. You might not get someone this time but maybe if you try hard enough you'll hit someone on your next attempt. Barry