Windshield Washer Fluid and Ignition Interlock Devices: What Massachusetts Drivers Need to Know
If you’re part of the Massachusetts Registry’s Ignition Interlock Program, you may not realize that a common household item—windshield washer fluid—could jeopardize your driver’s license. Despite the devices being labeled “alcohol-specific,” ignition interlock devices (IIDs) are not designed to differentiate between the various types of alcohol, including the methanol found in windshield washer fluid and the ethanol in alcoholic beverages.
This issue arises because ignition interlock devices rely on fuel cell technology rather than the infrared spectrometry used in professional breathalyzers. Consequently, these devices can misread methanol vapors as ethanol, potentially causing false positives that result in harsh penalties, including 10-year or lifetime license suspensions.
How Windshield Washer Fluid Can Cause False Violations
Methanol in Washer Fluid:
Windshield washer fluid contains approximately 40% methanol, an alcohol used to prevent freezing in cold weather. During use, the fluid releases vapors that can enter your vehicle’s passenger compartment through the ventilation or defrost systems. If an ignition interlock user inhales these vapors before blowing into the device, it may register a false blood alcohol concentration (BAC).
Rolling Re-tests:
False positives often occur during rolling re-tests, which require drivers to blow into the IID at random intervals while driving. For instance:
- One driver, after cleaning their windshield, inhaled methanol fumes and registered BAC levels ranging from .021 to .075.
- Another had a washer fluid spill inside their car, causing lingering vapors that led to repeated false readings.
Both drivers faced accusations of ignition interlock violations, which required costly hearings and the threat of severe penalties, including long-term license revocation.
Severe Penalties for Ignition Interlock Violations
The Massachusetts Registry of Motor Vehicles (RMV) enforces strict consequences for ignition interlock violations:
- Automatic 10-year or lifetime license suspension upon a confirmed violation.
- No discretion for RMV hearing officers—if a violation is proven, the penalty is mandatory.
Even minor or unintentional violations, such as those caused by methanol vapors, are treated with the same severity as actual alcohol use. This lack of flexibility makes it critical for ignition interlock users to take preventative measures.
Preventing False Violations
To protect your license, ignition interlock users should take the following steps to avoid false positives caused by methanol exposure:
- Careful Use of Washer Fluid:
- Limit the use of windshield washer fluid while driving, especially before a rolling re-test.
- Avoid turning on the defroster immediately after using washer fluid, as it can draw methanol vapors into the cabin.
- Ventilate the Cabin:
- Ensure you’re breathing fresh air from outside the vehicle before taking a rolling re-test.
- Do not keep unsealed bottles of washer fluid in the car, as leaks or spills can release methanol vapors.
- Seek Immediate Help for False Violations:
- If you suspect a false IID reading due to methanol, contact your IID service provider and the RMV at 857-368-7180 immediately.
- Visit your local police station to request a comparison breath test as evidence to contest the violation.
- Document and Contest Violations:
- Retain documentation, such as receipts for washer fluid purchases or service logs for your IID.
- If accused of a violation, contest the lockout in accordance with the Ignition Interlock Operator’s Affidavit you signed upon entering the program.
Legal Advocacy for False Violations
If you face ignition interlock penalties due to suspected methanol exposure, it’s essential to seek legal representation. Experienced attorneys can challenge the Registry’s findings and help preserve your license, as demonstrated by successful defenses in previous cases.
For example, one client avoided a 10-year license revocation after proving that washer fluid vapors, not alcohol consumption, caused their failed rolling re-tests. Similarly, another client overcame numerous alleged violations linked to methanol fumes by presenting evidence at a Registry hearing.
Conclusion
While ignition interlock devices are designed to enhance road safety, their inability to distinguish between ethanol and methanol can create serious risks for program participants. By understanding how windshield washer fluid can impact IID readings and taking preventative measures, drivers can minimize the likelihood of false positives and protect their driving privileges.
If you believe you’ve been unfairly penalized for an ignition interlock violation, consult an attorney with experience in Massachusetts DUI and ignition interlock cases. Proactive steps and legal advocacy can make all the difference in protecting your rights and ensuring fair treatment under the law.