Me again. I just wanted to post back saying that my hands are definitely drier after that treatment. I'm not sure if it was the baking soda that did it but my hands are definitely drier. If I move them about they get completely dry, if I'm sitting they'll feel a little like I'm in humid weather, definitely an improvement. I'm going to try again tomorrow with the baking soda. I'm getting pretty sore electrical burns on my hands now, but this is so worth it.
I'm not sure if it will work though. I've read that it isn't a gradual decrease in sweating with the iontophoresis. Is this as dry as my hands will get? I'll post back tomorrow with the results.
I should note that my hand sweating was never severe. I never had dripping sweat, it was always like a clammy feeling.