Hands are sweaty

Try using antiperspirant on your hands before the round. Apply then gently wipe excess off. Repeat as needed throughout the round. Be sure to use antiperspirant not just deodorant. Works pretty well. Experiment with it and determine how much to apply and when.

Well, a piece of dry clothing will do. But the best solution there is wearing gloves. Buy the most durable gloves you can find.