Given what is known about the unreliability of handheld breath devices like the Datamaster, it is easy to understand why some people mistakenly believe that refusing to take a breath test will come with fewer penalties than taking one and failing. Unfortunately, that is not the case. Iowa, like every other state in the union, has an implied consent law on the books for licensed drivers. This law makes it dangerous for anyone to refuse a police officer's request to test for alcohol.
People have been trying to beat the breathalyzer test for many years. There is a myth that sucking on a copper penny causes a chemical reaction in your saliva to make you pass a breathalyzer test if you have been drinking and driving. There is no scientific basis at all for this claim, and today's pennies are made mostly of zinc. Do not try this. Another myth is that breath fresheners, mouthwash, or strong and stinky foods can mask the alcohol in your breath and lower the blood alcohol content (BAC) readings.
Imagine you are driving home one night. Suddenly, you see police lights in your rearview mirror. As you slow down and pull onto the shoulder, you begin to feel worried. Why are you being stopped?