For best results, breathe into the sensor as if you are yawning. Try to breathe out the same amount of air at the same speed each time you test your breath. Your breath odor level will appear on the display. Wait at least ten minutes after using mints or breath spray and eating or drinking before using BreathAlert. Also, rinse your mouth thoroughly after brushing your teeth or using mouthwash and wait at least ten minutes before using BreathAlert.
Incorrect usage can cause a bad reading.
Also, avoid using after alcohol consumption. Alcohol vapors are detected by the sensor and could result in a false reading. BreathAlert is sensitive to certain environmental factors that can interfere with its ability to correctly detect the breath odor level. The gold standard is organoleptic sensory detection or the human nose. In a scientific setting, a panel of individuals will rate breath odor on a scale of one to five.