I had a new Kohler toilet installed, and it's one with a top-trip flush
knob. Unfortunately, I didn't watch as the plumber put the thing in,
and I don't know how to get the tank lid off. The lid comes up a little
and can be moved around a bit, but something's keeping it from going
any further. The installation and homeowner guides are of no help. I
don't want to force it, so can anyone tell me the secret to removing
the tank lid for one of these dudes?