Well, as I say, at 6 o'clock in the morning, I wasn't using mouthwash in the lab, but I did open the bottle we have in our breath testing room—we use it for testing our instruments and demonstrating to police officers—and both of the devices I had reacted to it. It was in close proximity, but it wasn't someone who was blowing towards it either.
On October 20th, 2016. See this statement in context.