Ok I have to go out for a bit, but this is the "wetness" or level of where wet is.

Where you see 100 that's the level, and 10 is the blend between wet and dry.

I try to get back if you have trouble a bit later. This is not my work, it's generally stolen from another one of Bill's shaders (posted somewhere on rendo I think, look for fog or mist).

If you plug this into a poser prop as is, you can see how it changes, changing the values.

The rest should be pretty clear  from Bill's post above.