Okay I was JUST reading about this and trying to make sense myself... and my biggest question right now is:
So you need an entire gallon of water for the few drops of solution in the drop checker?
You also need a fresh box of baking soda each time?
It just seems excessive for a few drops of solution to me. I would wind up throwing away an entire box of baking soda every 2 weeks or whatever the recommended time is for renewing the solution. Am I missing something, or is that just what people do to get this solution?