Talk to General Physician on Hyperhidrosis

I have been using iontophoresis process to stop excessive sweating. I bought the main product from iontoderma from canada. About 2 months back after using it for quite some days my hands were dry clean. in the water i did add some baking soda to increase the effectiveness of the procedure. But now after 2 mnths it sweating started again and doing the same process. Could you please assist me in the matter as what else should be done to increase the effectiveness.