Some of those links on that discussion are almost laughable from personal experience. If an officer has administered a breathalyzer, he's probably already done some other tests (ie, walk a line, touch your nose, etc.) that will support the breathalyzer reading.
I do about 30-40 breathalyzers a night when I'm working. I've heard the low carb diet thing in the past, and can emphatically say, that is 100% nonsense. I've lived pretty low carb (usually between 30-40 a day, but there's days I don't hit 20)... for about 3-4yrs. I heard this rumor a long time ago, and since I regularly have access to a breathalyzer... I breathalyzed myself at random times, every night for two weeks... Never, ever got a reading.
If you're breathing through a tube into the device, the odds of anything in the environment (ie, hand sanitizer, etc.) causing a positive reading, are almost zero. I have heard of of hypoglycemics can blow numbers sometimes when they have not been drinking... but I've never ran into it, and have never had anyone who blew numbers, claim it was because they were hypoglycemic.
