I've got a new set of water stones to sharpen chisels and plane blades. They came with a wooden holder, and currently I keep them dry and wet them when I use them. After use I lay them on a towel until they are dry again. My ?: Should I submerge the stones and keep them wet all the time, or am I OK doing what I'm doing now? When I use them should I be constantly wetting the cutting surface?