Robert,
I have actually found that pushing the Sanken down into the rubber mount can brighten a dead sounding lav. On ENG or reality shoots, where EQ at the mixer is not an option, this can sometimes help with a muddy lav, due to position or some other mitigating factor. I don't push it all the way down into the mount, though. Usually, just pushing it in until the windscreen tip is flush with the top of the rubber mount is enough.
So, do you always have the windscreen tip above the edge of the rubber mount? How do you deal with clothing noise? Sometimes, I'll put the mic element in the open-backed area of the rubber mount, turn this out toward the clothing, and tape it to the clothing with the rubber mount between the mic element and the skin, but open toward the clothing. However, this can still brighten the signal, which is not always desirable. But when I leave the mesh screen sticking out, it seems to have more clothing noise issues.
-Matt