What will give intoxalock false reading?

Intoxalock devices can produce false readings due to various factors, including the presence of residual alcohol from recent consumption, mouthwash, or medications containing alcohol. Additionally, certain foods, like ripe fruits or fermented products, can also lead to inaccurate results. Environmental factors, such as exposure to strong odors or chemicals, may contribute to false positives as well. It's essential to ensure the device is properly calibrated and maintained for accurate readings.