Don't Get it
I understand this device is meant to save lives, and that is the main point. But If I have to use a machine to test for alcohol.
It should test for Drinking. Not colon,Air fresheners, or eating a sandwich with wheat bread and then testing positive, I can't even use windshield washer fluid to get stuff off my window, or Armour on my tires. My friend got in with perfume on and it went off, so I guess I can't date for two years ether.
my Point is if you are going to invent something for a specific reason, it should work for that and that only. You may be doing your best, but please do better.