Add one more to the "heavy sweater club" or I say I am a professional sweater. I also can't say anything except what people have already said. Hydrate. I also ride a hybrid and carry a couple of smaller towels in my bag on the rack. and a change of shirt left in the vehicle if I drive to go ride. I used to carry a whole change of clothes when I commuted. But back to sweat, I would think that if you are like I am and grew up and nothing has changed my Dr. said something along the lines of so you sweat a lot, don't worry. This was after doing stress test, blood work etc.