I used to have the same problem, use a product called "Driclor" you can get it from Boots, or most pharmacies. It works mircales. It's like a deodrant roll on, you put it on before bed, and wash it off in the morning. Use your normal deodrant and you should stop sweating compleatly, and get NO sweatpatches. It does sometimes sting and itch when you put it on, but the results of no sweating, is worth it. So if it does sting or itch, persist with it as much as you can.
Hope this helps