04/20/2026
False positives with a Colorado DUI interlock device can happen more often than people realize, and from a Colorado criminal defense attorney’s point of view, the smartest approach is to treat every test like it matters: avoid mouthwash, breath spray, cough syrup, kombucha, or anything alcohol-based before driving, wait at least 15 to 20 minutes after eating, drinking, smoking, or va**ng, rinse your mouth with water when possible, and keep a written log if the device records a failed test you believe is wrong. I also tell clients to get regular device service, follow every calibration appointment, and report any suspected malfunction immediately, because in Colorado, an interlock violation can create serious problems if you do not document it early and correctly.