I bowhunt as well as any other kind of hunting that's legal.
I use bowstring wax on my hunting bows strings and cables.
I found it works great around the nipple to keep out moisture.
Just careful not to get it into the nipple.
I always fire a cap prior to loading to clear the nipple before loading.

If you wanna try cutting your own patches for the ball, just make sure the material
is 100% cotton. Any nylon or polyester will foul your barrel rifling.

I cut the fingers of of latex surgical gloves and stretch the finger over the front of the barrel if it's gonna be raining.