I have a tub in my bathroom that I have yet to use (I have a separate shower next to it), but it has recenly developed a 30 second drip that I can hear while lying in bed. It's driving me nuts. I've turned off the water and tried to take apart the valve, but can't seem to get it completely apart. And I have no access to the underside. Kohler is no help at all - their faucets don't leak, so why provide information on fixing them? The stem turns freely when you take off a guard, but I'm not sure if it'll just pull up. I'm tempted to stick a screwdriver up under that hex-nut looking structure and go at it, but of course if I break something, I'm screwed. My water here is so hard it was off the scale (no pun intended) when I did a test. It corroded my other shower's mixing valve stuck (I scalded a couple of friends who stayed over a few months ago), but I was able to get at that from the front to take it apart and clean it. Help!