If you’re new to Ontario’s Ignition Interlock Program or any provincial program across Canada you probably have a few questions. One of the most common concerns is whether everyday items, such as mouthwash, cough syrup, or even vanilla extract, can cause a “false positive” on an Ignition Interlock Device (IID).
It’s an understandable worry, especially if you’re relying on your device to stay compliant and get back on the road. The good news is that with the right knowledge and support from Smart Start Canada you can avoid unnecessary lockouts and drive with confidence.
Why Everyday Products Can Trigger a Reading
Many common items we consume or use contain alcohol, like ethanol or menthol. Vanilla extract, for example, can contain up to 35–40% alcohol the same type found in beer, wine, or spirits.
When you use these products and immediately provide a breath sample, your Ignition Interlock may register alcohol on your breath. While people often call this a “false positive,” it isn’t really false. The device is working exactly as it should it’s simply detecting residual alcohol from the product you just consumed.
Busting the Myth of False Positives
Government approved Ignition Interlock Devices in Canada use highly reliable, alcohol specific fuel cell technology. This means they are extremely accurate and do not mistake other substances for alcohol.
If alcohol is present even from mouthwash or cooking extracts the IID will detect it. The difference is that these traces are temporary. By rinsing with water and waiting a few minutes, the alcohol will usually dissipate, and you’ll be able to provide a clean breath sample.
Smart Start Canada Tip: Always rinse with water before testing. This simple step helps prevent failed starts caused by residual alcohol from everyday products.
Need Help Staying Compliant?
At Smart Start Canada, we don’t just provide Ignition Interlock Devices we support you through the entire program. If you’re ever unsure about what you can or can’t use, or you have questions about your device, our bilingual customer care team is available 24/7.
📞 Call us toll-free at 1-844-432-4776 for immediate assistance, or use our online form to book your installation and get answers fast.
Why Choose Smart Start Canada?
Smart Start Canada is a government approved Ignition Interlock provider with service locations across Ontario and nationwide. Thousands of drivers trust us every year because we make the process simple and stress-free.
When you choose us, you’ll benefit from:
- ✅ Reliable, discreet devices that are easy to use
- ✅ Affordable pricing with no hidden fees
- ✅ local installation and service centres across the province
- ✅ 24/7 bilingual customer support
We’re here to help you complete your Ignition Interlock program successfully so you can focus on moving forward with your life.
Get Back on the Road with Confidence
A failed test can be frustrating, but with the right habits and a trusted provider like Smart Start Canada you’ll avoid unnecessary setbacks and stay compliant with your program.
If you’ve been ordered to install an Ignition Interlock Device, don’t wait. Book your installation with Smart Start Canada today and take the first step toward driving legally and responsibly again.
👉 Contact Smart Start Canada now to schedule your appointment and get back on the road with confidence.
Alcohol from non-drink sources can cause a false reading (Please check any products that may contain alcohol). Rinsing your mouth with water and waiting a few minutes before testing greatly reduces the chance of a false positive.
Yes. Many mouthwashes contain alcohol and can trigger a warn or fail shortly after use. If you use mouthwash, rinse thoroughly with water and wait several minutes before testing. An aborted or failed test from residue can usually be cleared by rinsing and retesting.
Do not leave the vehicle if a retest is requested. Air out the car, rinse your mouth with water, wait a few minutes, then take the follow-up test as soon as the device is ready. You can file an occurrence report explaining the circumstances to your monitoring authority. Excluding Alberta
Certain conditions and medications, such as cough syrup containing alcohol, can affect a reading. The device measures alcohol, not illness itself. If you believe a reading was caused by a medical issue, rinse and retest, and submit an occurrence report documenting the situation. Excluding Alberta