http://www.tite-grip.com/
I have chronicly sweaty clammy hands, and have been a compulsive chalk user since I started climbing. Even with chalk, my hands are soaked a few moves into a difficult route, doing little to inspire confidence. I got some samples of this stuff early in summer. Some of the samples were already dried up when they arrived, but a few were intact, so I tried them. The seemed to work great, but with only enough goo for a couple days, it was hard to reach a conclusive decision. This fall I got fed up with sweaty hands and decided to buy some production tubes of the stuff. It doesn't work miracles, but it is still a great product, especially when used with chalk. No more chalking up three times on three move boulder problems at the gym. The other day I forgot to put the goo on before going to the gym and really noticed how well the stuff worked by its absence. Anyhow, if you have sweaty hands too, you might want to try this stuff out. I am also thinking about trying it on my feet, but havent yet. Seems like it could really help there as well.