I'm new here, this is my first post, but I'm intrigued by this concept and your very scientific approach to it! I'm tempted to try it too, as I love all things data collection. I look forward to following your thread. And sheesh, I wish those strips weren't so expensive too, or I'd be on Amazon ordering them right now. I have a trip coming up next week, but maybe when I get back I'll embark on the same experiment and just deal with the cost of the strips. Good luck in your testing.